I'm going to go ahead and assume that you didn't buy a "really fat kid" for yourself, and 'splain some things that I've learned as a nerdy Prius owner...
First, it's not gutless as you might think. It's not going to win any awards for acceleration, but it can do 0-60 in 9.7 seconds. That's probably on the slower half of the scale, but still faster than a Yaris Hatchback or Matrix, as well as non-US models like the Avensis, Aygo, or Auris - and that's looking only at Toyota sedans. Most of the gutlessness comes from us schmucks inside the car, who are in no hurry to rush you to the next red light when we can get there at the same time as you, and with half as much fuel, by taking it easy. Some of the gutlessness comes from a software setting that adjusts the throttle response to the gas pedal's position; in Eco mode, you really have to mash the pedal if you want to move, while PWR mode makes it more like most American cars where it's jumpy if you so much as look at the gas pedal. In between is "Normal" mode. There are plenty of Prius owners who hate the car in anything but PWR mode because they like to accelerate fast.
Second, it is a HUGE car on the inside relative to most of my friends' sedans. A good amount of the space is vertical, so it helps if whatever you're carrying is tall or can be stacked. But I've carried 3'x8' sheets of plywood, an 8-foot ladder, or 4 people and backpacking gear for a 4-day wilderness trip. Many people can carry several bicycles inside the car without taking them apart - my wife and I are both very tall, so we have to take off the front wheel of our bikes to fit our bikes in. Out of all my friends, none have cars that can carry any of those things - except one bicycle with the wheels removed, and the handlebars sticking out the window.
Third, I'd say it doesn't really have two power trains; it has one power train of which the gasoline engine and two motor-generators are an integral part. The car would be incapable of driving if any of them are removed, although it'd be easier to remove the gasoline engine if anything. The Prius doesn't have a normal transmission; there are two planetary gearsets that connect the MGs and engine to the wheels. By adjusting the speed and direction of the MGs, pretty much any gear ratio can be obtained. It's sometimes called an "eCVT" because of this, but it could just as easily be called a single-speed transmission. Get rid of the electronic parts of the powertrain, and you'd have to put in a transmission instead to replace it. Also, you'd lose the regeneration abilities of being a hybrid. Of course, if you remove the engine, you'd have to use a much larger battery instead - and even then, the Prius motors are not designed for high-speed use (over 45 mph, the engine has to be spinning to keep the motors from over-revving; I think the limit is about 60 mph in the plug-in variant of the Prius). So both halves of the powertrain are really required for it to work, much less for it to work as efficiently as it does.
That's not to say it's a car for everybody - and indeed, if your choices come down to a Tesla anything or a Prius, I'd go with the Tesla any day unless you plan on regularly exceeding its range in areas where high-speed charging is not available. But it's a good choice of cars for many people.
That said, I'm not surprised that hybrid sales occasionally have a down year - but the trend still seems to be pretty positive. Even though they mention share dropping from 2009 to 2010, the hybrid share is still up about 15% since 2009, at about 3.2% of all cars. Meanwhile, EVs are starting to take off, and often catch the attention of the same eco-minded type that was purchasing the early hybrid models years ago. Still, they only amount to about 0.6% of all vehicle sales. But I don't think hybrids are a long-term solution, just like gas cars aren't either. Unless we start synthesizing gasoline from something other than oil, we'll need to find an alternative fuel sooner or later - whether that means EVs or something else, only time will tell.
All I can say is that I hope Tesla gets other auto makers fired up, otherwise I may have to find a big pile of cash next time I want to buy a car...