I'll never understand the hate for Uber.
You may not agree with it, but surely you must understand it? For what it's worth I am ambivalent about Uber and I am a Bitcoin developer, so I'm hardly someone to have kneejerk reactions against libertarian positions. But I do fully understand why Uber makes people uncomfortable.
The basic issue here is we are all raised in a social environment where it is assumed that law and morality are the same thing. Children aren't exposed to the difference at all - if a child asks their parents "why can't I do this thing?" and get an answer like "because it's against the law honey" then they aren't likely to enquire any further, and if they did, it's unlikely their parents will launch into a deep discussion of the history and theory of state power. It's just something you don't do because it's against the law.
In parallel children observe something else - things that are illegal are very often bad, and things that are bad are very often illegal. If a kid doesn't like it when her older brother steals her toys, and then her parents tell her that (a) stealing is wrong and (b) stealing is against the law, the link between law and morality is reinforced. Keep doing this over and over and the two notions develop as one.
Eventually, when we're much much older, we may start reading in the newspapers about miscarriages of justice. We realise the system is flawed. We may encounter laws or regulations that don't make much sense. We may decide that laws in other countries are unjust. But the notion that breaking the law is inherently immoral is ingrained very deep and is very hard to discard. Does English even have a word for an act which is illegal yet moral? I can't think of one. The closest is the concept of civil disobedience, but somewhere along the line that notion got linked with the idea that you have to put yourself up for arbitrary punishment as part of the "protest". So all governments have to do is make the punishments incredibly severe and hey, now there's no civil disobedience anymore, thus all law must be moral, right?
Laws are especially important because they are intended to give people stability, certainty and the ability to make long term plans. Some philosophers argue that the entire purpose of the state is to give people the ability to make long term plans. Certainly, stability is how regimes like the PRC justify their existence. The ideal body of law is precise, easy to understand, minimal, just and yet robustly enforced - thus everyone knows where the line is drawn and everyone can stay on the right side of it. Of course, real law falls short of this ideal quite often.
Now throw technological change in the mix. Larry Page once observed that it seems every time someone invents something new it starts out by being illegal. I can't quite remember where he said this unfortunately, so I can't give a citation. It might even have been some internal Google event. But he's said very similar things in the past in public.
So, enter companies like Uber. Or Lyft, or AirBnB, or even PayPal (it had a world of legal pain in the early years). Does anyone seriously think it'd be possible to build a service like Uber in the legal way? Bear in mind that many of the taxi regulations that governments want to mindlessly enforce specify details of things like how CB Radio is to be used (irrelevant with smartphones), how to print license information in the vehicle (irrelevant with smartphones), that the vehicle should be bright yellow so it can be spotted from the street (irrelevant with smartphones) .... in India they even specify that you must have a minimum of 12 phone lines going to your New Delhi based HQ! And you can forget about just asking nicely for change. Taxi regulators appear to be pretty much the opposite of dynamism, and taxi regulations are so boring that no parliament or local council is going to radically overhaul them for a company that hasn't got any customers yet, against the interests of the incumbents.
In a few parts of the world, it might have been possible to launch something a bit like Uber without any serious changes and with a cooperative partnership with the local taxi regulators. But it seems from practical experience that this would exclude vast chunks of the worlds population. And without economies of scale, perhaps Uber wouldn't be anything like what it is. So we have a case where to make progress, technologically, the law must be broken on a massive scale. But of course if the law ceases to be respected ..... where do you draw the line? Suddenly, there is no certainty any more. That stability the law exists to create is gone.
Therefore whether you approve or disapprove of Uber specifically has little to do with taxis or the details of these regulations. It's more of a proxy debate for a much deeper issue: which do you value more? Technological progress, or stability?
I have seen no surveys. But I'd be willing to bet that support for or against Uber has some kind of slight age bias to it.