My findings with 2.01
Safari does feel a little snappier, I don't think thats just because I read it here first, it feels more responsive to touch gestures.
Contacts: I still get delay on opening contacts. 3-4 seconds
Sms: I still get delay on opening Sms. 3 seconds.
Lagging typing: Not experienced it yet, but it was always fairly random when I did get it, and would have to hold home button to force quit the app, then renter and lag was gone.
Stability: Whilst typing this I was also browsing app store. The phone reset. That's never happened before. The phone then stayed on the apple screen, every minute or so the phone would do 2 quick vibrations, I assume this is some sort of error code. Did a force reset and it's back up and running.