i once read comments from 43rumors.com, and a photographer with both OMD EM5 and the Nikon V1 claim the Nikon AF to be in a different league, that is the tracking ability is much better.
the m4/3 is already fast in still, but tracking is still lacking.
The Nikon hybrid AF seems to be the best AF system for now, but they benefit from a smaller sensor, lighter/smaller glass for the speed i guess.
if Nikon ever come up with a similar 1 system but with APS-C, i will be all over it.