Now, now lets not have any name calling...he's just stating common sense. The other mfrs take the base Android stack and modify it (extensively at a low level) to work with their hardware and make the ROM image and with that (or the hardware itself) you can insert any backdoor you want.
An example we know about is our friend Lenovo using the PC ROM they modified to install their phone home spyware onto your PC after you do a clean install - it was Windows but something similar or worse could be done in Android if the mfrs felt they should (by govt suggestion perhaps): http://arstechnica.com/informa...
Most of the other smartphone mfrs are keeping quiet because they are friendly with their Governments - Samsung (I have a Galaxy S5) for example is very close to the South Korean Govt (who is a good partner with the USA and in particular its military and intelligence apparatus). Microsoft is very friendly with the U.S. government and a "partner" with the NSA and they certainly won't protest this either. Cause they would line up with their govts not their customers.
It's important to look at the big picture, from a business standpoint it makes sense to work with your govt and their desire to spy on their citizens as they control your market access. Frankly its odd that Apple is doing this from a purely business perspective, from a moral perspective it makes sense - but most companies don't care about moral issues and will faithfully line up with their govts surveilance apparatus when the call comes no matter the consequences for their cutsomers / citizenry. Remember all those German companies that closed up shop and moved out of country in the 30's after the Nazi's were elected? Yeah, most just shrugged and fell in line. That is exactly what is happening (and what would be expected to happen) in this fight over privacy - if the govts want to surveil the population of the planet (which they do), most smartphone companies will ask how they can help.