True, but for those of us that don't have a machine rest, multiple 7 - 10 shot groups are a better representation than 3 - 5.
Here is the link again for those who haven't had a chance to read it. Let us know if you have evidence to disprove anything Molon found in his testing.
http://www.ar15.com/forums/t_3_118/279218_The_Trouble_With_3_Shot_Groups.html