I think average of LPSG cocks is about 8 X 6 (correct me if I am wrong).
It all depends on what you mean by "LPSG cocks." If you mean the ones on here that get most of the attention, then yes. If you mean the ones belonging to the guys brave enough to post pics of their cocks, then the average is probably a bit above the real-world average.
But if you mean all of the membership, then I doubt that the average is different from the general population.
Remember, a lot of us are drawn to this site because we feel so bad about how small our own cocks are.