I'm with @louparis10 , i.e. fortunate enough to see quite a lot of erect dicks up close and personal...As a gay guy, I've seen quite a lot of dicks and can confirm that statement. I had sex with many guys and the "average" is about 6".
Myself being about 6.6", many of my partners say that I'm above the average...
I do think the published statistics (around 5.1 to 5.4 inches in length, 4.7-4.8 inches of girth) are just a little smaller than reality -- but not by much. I'd guess 6 inches in length and 5 in girth is about average, at least for Americans and Europeans....