well the 335i is underrated in power, and the power is put down really well, if u look at the 0-60 times, the sti loses at around after 45mph its intial advantage of AWD launch and great 0-30 time. the AWD really does drag on it a bit, but a tune and such will wake it right up, trust me i know
take a look at the trap speeds to get a better idea.
also, what i didnt and might update this thread with is the way they recieved the 0-60 and such times or the launch technique they used.
comparing the STI using the only tranny, MT, edmunds required a 6k rpm clutch drop, which they call brutal, to get there calimed 4.8 seconds to 60 mph. so a real world of about 5.1 sec or so would be what the STI would be rated at in real world w/o dropping the clutch to 60mph imo.
but unfortunately i have yet to see a manual tranny 6mt 335xi do a 6k clutch drop or etc. and see the time it has to recieve, i would suspect its 0-60mph would get further in the 335i 4.8 time (4.6?)