What do PA, PvP, and Schlock have in common?

My brother Randy pays more attention to these things than I do. Penny Arcade, PvP, and Schlock Mercenary are all webcomics. All have a print presence. All of them are supporting their creators as full-time cartoonists. This you probably knew. This morning I found out that they all have a Google Page Rank of 7/10. That's not news for PA or PvP, but it's a recent uptick for Schlock Mercenary. Thanks, for the heads-up, Randy! (And thanks to the rest of you for not only reading, but also linking to Schlock and talking about it on your sites. Google Page Rank is something YOU did... not me.)