Lol, this thread is funny.
Not in the sense that I'm trying to belittle people's problems. But seriously, "worst ever"?
How much are you willing to bet that there are threads like this after every single release?
I have to say, from my limited experience, the upgrade has gone very well. I kind of expected a total crash and burn after I read some Gutsy upgrade stories after that come out, but I haven't run into any problems yet but one (icon themes broken).
And yes, the system does feel a little faster.