The verdict is in: EOS-M is terribly SLOW.

" However, the cost (esp the EOS adapter - how can a dumb spacer tube cost nearly as much as an S100 camera?!), slower AF and lack of any optional OVF/EVF mean that we will probably stay with u4/3 when the GF1 is replaced. The image quality difference between current u4/3 sensors and Canon is small or nonexistent, and not enough to justify the other downsides."

I fear that the E-PL2 can focus much faster than Canon's $800 brick... Maybe even slower than the E-PL1!

Pair that with a Canon EF/S lens and it gets worse.

The question is:  Can a firmware fix that flaw?  If so, to what extent?

If it does perform as slow as suspected, would you buy it right away, or wait for a Canon patch (assuming it can be patched)?