Have you been following the fracas over at Harriet, the Poetry Foundation blog (named after founding Poetry editor Harriet Monroe)? Juliana Spahr and Stephanie Young began it by showing and analyzing "the numbers" on women poets published in avant-garde magazines. Is the experimental poetics community particularly sexist? In the middle of this discussion, Ange Mlinko suggested that the avant-garde may be more sexist than mainstream literature because the avant-garde has often renounced the lyric. And on and on it has gone.
If you're looking for a way into the middle of the discussion (that might be the best entry-point), I suggest starting with one of Christian Bok's rejoinders. You should be able to link your way around from there. And/or read Ange Mlinko's main commentary on the matter.