So I am stock and didn't update and chose to sit back and see what happened. During that time I've noticed some improvements. Don't ask me how, but there is definitely a change. We all know about the occasional lose of data service with 4G but it seems that 4G comes in a little better and doesn't drop, as much. It still does, but not as much. The phone is actually faster too. My Quadrant scores used to be in mid 800's and the one yesterday was just under 1050. My Speed Test yesterday was 37167 download and 7716 upload. The inbox for email has changed inline with what everyone else is reporting that got the upgrade. Also battery life seems a little better but that's because I recalibrated it (ran it down to zero and then up to 100, turned on, repluged and back up to zero, etc. a few times). So I don't know how or why, but it is running better. And yes I did check, about a dozen times so far that I am still running Froyo.