Top speed I reckon is going to be about 100mph on the clock (which is 2mph out at 60mph according to sat-nav) and on the five tanks of fuel so far I've average 65mpg plus over the 500 miles, (that's 54mpg in USA).
It's still running in though but today I notched up 50 more miles and cruised for a while on the motorway at an indicated 85 with only half throttle.
She's booked in for first service on Friday (due at 600 miles), so I have to clock up a few hundred this weekend.
Tyre pressures are 29psi front AND rear. But 36 at the back if you have a passenger, according to the handbook.
(updated May 11 2011)
Full specification of the VT750S below: