The following is copied from the seventh paragraph in the link you provided and is the point that I was trying (although not very well I guess) to make:

"Size Plus Efficiency Equals More Power. If you can increase pressure in a combustion chamber at the time of ignition, pressure during combustion will also be higher. Higher pressure pushes the piston harder and more work gets done—your Harley accelerates quicker or climbs the hill more easily. Higher-compression pistons, thinner head gaskets, or anything else that make the combustion chambers smaller can achieve this result."

I was speaking in general terms and responding to post #2 regarding 255 cams bringing in high compression basically on their own and requiring compression releases. This is not the case at all. 255 cams are added to 96" engines on a regular basis and with no other changes to the engine compression releases are not needed in any way, shape or form. Generally speaking higher compression is gained by decreasing the size of the combustion chamber.