Don't get me wrong, today there are few porn stars who are more than 7.5" but during the last 20 years we had:
- Mandingo, Tony Duncan, Jack Napier, Mr. Biggz, Max Black, Dredd, Julio Gomez, Danny D, White Pony, John Rasputin, Sly Diggler, Slim Poke, and probably Brickzilla and Dunta Amazin - overall 14 guys who are at least 8" (7 currently active);
- Lex Steele, Wesley Pipes, Rico Strong, Ice Cold, Jax Slayher, Rob Piper - overall 6 guys who are bigger than 7.5" but smaller than 8" (5 currently active);
- Justin Long, Richard Mann, Boz, Pressure, Isiah Maxwell, Michael Williams, Cash Boss and MAYBE Clover - overall 8 guys who are COULD be bigger than 7.5" but there are not enough facts to claim that (5 currently active).
Total: 20 guys who are definitely bigger than 7.5" and 8 guys who are maybe bigger than 7.5" (12 and 5 active respectivily).
That's not full list because i could've easily forget someone, but my point is that there are much more guys who are longer than 7.5" in porn than guys who are thicker than 6.3" (aka Shorty Mac, Shane Diesel, Billy Glide and maybe Jez Christ/ Mr. Kane - 4 guys).
Of course, you are absolutely right that constant exaggeration of all guys regardless of actual length to 10"-11" is seriously affected how many people view anything less than 8" as "small" or "average" while in reality only 1 guy out of 1022 has honest 7.5" NBP.