Well, after six weeks, I finally got word that I'd made into the top 2,000 entries (10,000 were possible, but I don't know if Amazon received that many) based upon my "pitch" (which I took to mean my query sans biographical info). However, I didn't advance to the quarterfinals, which were decided by a different set of judges, Amazon Vine Reviewers, who read the first 5,000 words of my novel.

I've been promised the reviews from the Vine Reviewers, but so far, zilch. I don't know why those reviews wouldn't have come simultaneously with the rejection, if they existed to provide a basis for that rejection.

In reading the Amazon entrants' discussion threads, I've learned that the Vine Reviews aren't necessarily the deciding factor for advancing (scuttlebut has it that some reviewers are rather surprised that excerpts they rated poorly advanced). So it's hard to know how to judge the feedback I'll get.