Why i think there is no soak test. Only ota. Ics is a whole new os not an update. If there was bugs in it there is no easy to go back to ginger bread. So lets say they found bugs and address them on ota. They would have to make 2 ots with the fixes. One for three people on gingerbread and the other for the soak testers. I feel they wouldn't go into all this trouble. Might a well release the ota and patch it if it has any bugs.
You're assuming something that may not be true...