I'm not sure I agree.
There's a lot of good books at Image outside the names that Robert mentioned.
In some cases they have surpassed them.
Remender, Spencer, Aaron, Seeley, Williamson, Hawkins, Lemire & Ellis are putting out great books.
In the case of Remender, who I class top tier now, his stuff is selling massively in trade. Deadly Class is the one you hear the buzz on, but he's making a fortune on Low, which is his highest selling book (it also sells well outside the US) which you would never guess by Internet chat.
I think that the age of the average poster needs to be taken into account when it comes to the talent that rolls off the tongue.