Thanks for the replies!
My point is that I want to know if it's likely that I'll spend 100$+ extra on this phone or not..
I'm aware that reading the internet is a bit 'dangerous' for getting wrong ideas, indeed only people that have issues usually post..
However, if you search google you'll find a lot more issues with the Nexus 4 compared to other phones. It's also the only phone where I find (quite a lot) replies like 'it fell once from 1-2 feet & it's broke' or on the temperature issue. That's why I concluded the Nexus has poorer glass than other phones.
PS: I find the car crash comparison to be a bit too exaggerated, I would'nt expect my phone to survive a fall from 10 feet heights also..