Yes, that was speculation. The RTR8600 is about a year old. No wonder they didn't put it into the iPhone 4S (it would have had a bad effect on battery life). I guess the 28nm chips weren't ready on time.
I agree with you. I said it because people on here were talking about it like it was a done deal.
RTR8600 is what the Xyboard use from Motorola on Verizon.