Hi Bro...
I am pretty sure that you are eager to know....since we are in the same boat.
Lets start off with the AF with kit lens, I am quite surprised by the kit len's focusing speed as it is really fast without USM. I never buy the kit lens but tried it at Canon Showroom in Vivo. Maybe my comparison is between the kit lens from 400D and 60D, so the jump is too far.
When I first try out the 60D mounted with the EFS 17-55 IS USM at the shop when buying, the focusing is not really that fast as due to the indoor lighting condition and the 9 AF pts are activated. When switch to center spot focusing, it is fast.
Overall I feel that the AF has been improved marginally as compared to my 400D. At least, the lens do not search so much right now. Lighting plays a part in AF. Maybe I had demand too much when changing to a new system, so the result is marginal. But the setup do suits my photography workflow. The benchmark for fast focusing still belongs to 7D.
Something which I have forgotten to mentioned is the FPS....the blasting of shots is not as SHIOK as the 50D....cannot fire like a machine gun. Blasted the 50D at the showroom sometimes ago....I feel like the Terminator "I will be back!".....HAHA!!! Anyway I have no intention to abuse the frame counts on my camera....
This is a rush purchase as I am going to shoot my best friend's ROM next week or else I will probably wait for a while longer like during the next com fair or Christmas for better promo. Right now, I will just need to get use to the setup and get ready to shoot my friend's ROM
Hope I have answered your question.