They aren't there yet.
They need to get there. POLYPHONY is one of my favorite anthologies. I have enjoyed many of the stories in past years.
The authors have already agreed to reduced rates for their stories, and these are good authors. You can see a list of stories scheduled for the anthology. You can also order a copy from that link.
Go pre-order a copy of POLYPHONY. Heck, pre-order a couple. Give them to your local library, or your local college, or your local high school. Help great speculative writing reach a larger audience.
Go order today! Go order right now! I'm going to!