Saw it on the store yesterday night and play with it.
The normal AF is faster compare to 60D and the live view AF work really well and fast. High ISO performance basically same as 60D.
By the way, I notice that the 70D user manual indicate that there are 2 version: 70D (W) and 70D (N). 70D (N) do not have WIFI... certain country cannot use WIFI??
Have a nice day.