Our game against Steel-High was about as quality as you can get...they had several D-I prospects and were fast as hell, and our offense and defense were nasty. We could go a legit 5 wide at times, had a 2,000 yard passer, 3 different 500+ yard receivers, and a 1,200 yard rusher. Our D was only allowing like 8 points a game or something like that. I think either team could have played in AA and held their own.
Then sometimes you have freakshow teams at A, like Southern Columbia in 2006 when they had 2 guys go D-I, and high major D-I at that (Pitt and PSU). They also had a guy like 6 years ago that went to Notre Dame.