Bob have not tried against the Hassy bodies but I did play with a H3 couple weeks ago and I would say it is faster and more like a D300 or 5D . Yes it is pretty quick. Also shutter lag also seems to be faster. Af does seem to be noiser but the shutter is dampened a little better than the AFDII. So far i really like the way it feels. I will be giving it a heavy run next week, so we will see how it does under the gun in a fast paced situation like runway stuff. I will be shooting the Phase body , P25 Plus and the 300mm AF lens at high ISO's. This is pushing the system right into 35mm world, fingers crossed