The ACC actually rivals the SEC in terms of NFL talent, but the teams themselves are just so crappy. I don't get it, to be honest. Terrible coaching? Big dropoff after the top players?
I agree with this and you have asked an interesting question.
There are many quality ACC players on NFL rosters. I believe the SEC has the most NFL players but I think the ACC was #1 until a year or two ago.
I think the quality of coaching is greatly superior in the SEC to every conference. Beamer is the cream of the ACC crop. Dabo and Fischer are obviously great recruiters but I question their ability to win big games.
I think one thing that separates the SEC from the ACC is the amount of quality players the schools receive (or pay for lol). Look at Alabama for an example. I understand Alabama football is the top program in the country, but they just lost a lot of important players and I've read that a lot of folks think the team they'll field this season is better than the championship team last year.
It's true that the ACC does land NFL caliber players (look at the amount of UNC players drafted since 2008) but the overall depth of SEC rosters is what makes the conference elite.