Someone did an analysis of blogs by looking at the Technorati Top 100 over the last year. That list measures in-bound links, not traffic (and I’m not entirely sure I undertstand it’s method for collecting in-bound links).
Interestingly enough there are blogs scattered throughout the list. Since webcomics still do not pay a lot of attention to blogosphere lists (and don’t always do things the right way to be counted) I suspect a lot more webcomics would probably show up here if their sites did things in a more "bloggy" way. Still you see CTRL+Alt+Del, toothpaste for dinner and VG Cats mentioned.