From what I have seen the Italian scene is wonderful too, in general the mainland European comic culture is fascinating. And this comes from a out and out superhero fan.
The fact of the matter is that both mainstream American and Japanese comics are schlock, doesn't mean they can't be entertaining. The whole "which is better" debate is just fans trying to justify their hobby by going, "hey at least it isn't that."
And a while back I heard mention that mainstream comics aren't worth serious discussion. If this refers to the actual literary merit of most of them I can agree to that, I am a big Claremont fan after all and I have no illusions about what I am reading. But if it also includes their role as a societal mirror among other aspects I must strongly disagree.