My copy for review was shipped today. I should have it by Wednesday. There is moratorium on full reviews, and the first dibs on mine will be going to PhotoNews, but by the end of the month I should be able to share the full review.
My contact at Tamron seems more pumped about this lens than any I've heard him mention before. He said this to me: "Our internal tests are showing the lens provides very sharp photos and every one - so far! - is very pleased with its performance."
I'm excited to get my hands on it!