i would bet that someone will figure out how to root the OTA in time. the waiting is understandably the hardest part.
that said, i had to sbf to update to the rooted GB when it was released since i was on apex. using titanium to backup and restore my apps, the whole process from sbf to GB with all my apps back took about 45 minutes. i can understand not wanting to take that time, but it beats waiting for a root exploit to be found IMHO