nope, it's pretty random. I set it to appear on 20% of users only when I publish, and who gets it is completely unpredictable. After a day of seeing no weird crashes nor geting strange reports, I rollout to the remaining 80%. And I'm glad I do this, because today's crashy build would have meant 200 emails instead of the 40 I got
By tomorrow you should have it, unless I find some major problem in the build.