I'm not a dev, but I'm also not an idiot.
That being said, given what I've read about iOS 7 and it's "raw-ness" (and the fact that this is my first iOS beta download), I'm actually quite shocked by the overall stability, especially on my iPhone 5.
I started with it on the 4S and it was laggy - understandable.
So I decided to simply bite the bullet and put it on my 5 - what's the worst that could happen? So far, it's been pretty stellar. Plenty of things that I hope and guess will change, but so far, pretty smooth - especially for a Beta 1.
That being said, I know there's a lot of negativity and hate out there for people like me (who aren't a dev and yet have iOS 7 on their device). Just remember, not all of us are mindless idiots complaining about an app not working or bugs/lags. And to be quite honest, the jackholes that are complaining likely won't listen to any of us trying to explain the nuances of beta testing anyways.