It seems that the backs of these chisels are a little dished or "hollow ground". I found information on one of the sites that sells them which mentions this. The front blades are apparently ground on a wheel, "hollow ground" too.

I have been sharpening them with my new Sigma Power and Select 2 stones. With these stones and the hollow grinding there isn't very much steel actually being abraded by the stones and they get quite sharp fast. I assume this is why Ashley Isles grinds their chisels this way.

I was just wondering if other Ashley Isles users were working with the hollow grinds these chisels come with or if some were grinding the faces back flat? The information I read indicated that the hollow grind on the backs is minor, which must be why I did not see it until I started working them on the stones.