You don't send phones out in the wild for beta testing to 5000 random folks. That's industrial suicide, and about as bone-headed a move they could do.
My company does crap like this all the time. (in-house issues mostly though). Normally it's because one person is hell-bent on a timetable and is too stupid to see the ramifications of not fully testing out product _____ properly beforehand.
This whole situation with the SD card reminds me of the same thing. With the number of people who are having this problem, there is ZERO chance this would not have been caught with proper testing. So, we either have a case of 1) this really is only affecting the units given at the I/O, or 2) they rushed this out the gate too soon.
I am hoping for option #1, but I think we will find it behind door # 2. With how these last few months has played out, it just feels like they were rushed.
Please Sprint, prove my fears unjustified.