I think everyone pretty much has this covered but I thought I might throw in my two cents as well.
First off, a 30 inch draw archer definitely has more to worry about in terms of any given bow's level of forgiveness when compared with someone shooting a 28 inch draw. That extra 2 inches of powerstroke means there is more distance that the arrow is attached to the bowstring which means that there is a great chance of shooting errors affecting arrow flight and thus accuracy.
Second, a 30 inch bow with a 6 inch brace height doesn't have a 24 inch power stroke. 1 3/4 inches needs to be subtracted because of the AMO method of measuring draw length. So, a 30 inch draw length bow with a 6 inch brace height actually has a 22.25 inch power stroke. I made the same mistake a few years ago...
