I wouldn't be suprised if Fuji comes with a very fast AF mirrorless camera. They have done a very good job in producing quality cameras and lenses.I'm hoping they do, they're already acceptably fast for all kinds of non-action work.
another interesting quote from that interview, however:
Q: If you had to guess, how many years will it be before the DSLR has no technical advantages over mirrorless?
A: Thinking about the current advantages of DSLRs there’s focusing speed, lens lineup, overall responsiveness… I’d say maybe two or three years time.
They respect the (AF) speed abilities of the 7D2 and they're gunning for it.
Some Fuji (& Olympus too, i think) lenses are using voice-coil type focusing actuators which are capable of moving very quickly and that could be the ticket to some very high performance mirrorless systems as soon as their bodies catch up a bit more.
SLR mfrs seem to be very fond of various types of rotating motor drives for AF, and they certainly work well enough. But smaller lighter lenses can use different types of drive, like the linear actuators, more readily. And that will be another benefit to ML systems as they mature.