I can only add to the chorus here in praise of the G2. I also own the 21, 28, 35, 45 and 90 mm G series lenses -- all of them super. I have long been mystified, as David H. is, about the "bad press" the G2 has gotten. It's one of those cameras you need to grow into, and when you do, things like the small viewfinder and the awkward manual focus just don't seem like big issues any more.
As for the AF mechanism, I don't find it any more unreliable than the ones I've used on Canon SLRs, and it certainly works just fine over 95% of the time. Recently I shot three rolls at an auto race, mostly quick grab shots, and got back just one frame that was out of focus. The focusing tip from rhogg is right on target. I use the AF lock button all the time to prefocus, and it cuts down on focus "hunting" hugely and makes the shutter lag negligible. For a handy guide to this, see
http://www.botzilla.com/blog/archives/000378.html.
Great to hear from all of you who weren't bamboozled by "what everyone knows" about the G2.