I read it when I first received my March Asimov's. (That was a month or so ago?)
I thought it was a terrific story. I loved how you weaved issues of race and slavery into the mythos then made them pay off at the same time as the traditional mythos. The result was so satisfying, especially on a fundamental structural level.
While I'm gushing, I read Carnival on my trip to NYC for the day on the 9th. OMG. I literally could not put it down, on the 10th, until I'd finished it. It is such a rich, complex, satisfying work.
(I can't talking about how the story really worked for me without serious spoilers. So I'll leave it at just this one thing: Your deconstruction gender stereotypes was jaw-droppingly wonderful. Thank you for the ending. There were several beautifully written pages where I worried that you might give in to doing the standard thing, but then you didn't. I should have had more faith.)