Which pro-sumer cameras have the least lag?

I was wondering if there is a no-lag prosumer camera, as this is the major complaint of non-slr digital users. Despite this fact, I have never seen lag listed as a spec in a digicam comparison. I have seen an advertisement for a Lecia 4mp camera that claims no lag. I have also heard a friend claim that their Cannon G3 has no lag. The only quantitive claim I have seen published is for the Olympus E/10, E/20 (claims 60miliseconds), but this is and SLR. Do you know from experience which non-slr cameras are "quick on the draw" in auto-focus mode?