Actually, that thread count is really high for quilting. Batiks are the tightest weave usually used for quilting and they are between 200 and 250. I think they would work all right for piecing, but quilting it will be the nightmare. When I quilt batiks on my longarm, I am putting in a new needle with every other roll because the weave of the batik is so tight that it dulls the needle and the needle starts to tear the threads.
I know that for my sheets I LOVE the 1,000 thread count...won't be quilting with that material though!