I wish I had metrics for everyone, but so far there seems to be some inconsistencies with what's being received. At least a few are used, a lot are new (at least via this forum).
The Angry Birds black screen is a major concern - that should NOT happen with build 3389, it was actually the first build that fixed that problem. If you are seeing this issue, I would recommend checking your build number and report it here, please. If some of you have 3389 but others have 2967 or 2963 (and I hope you don't) then the 296x users definitely want to upgrade to the latest stock right way. 296x builds are also more prone to FC's, acore issues and just plain old failure to boot - that build stunk big time.
Sorry that these don't seem consistent, but don't shoot the messenger. I don't even work for these companies, I'm just a GTAB owner like the rest of you!