Isn't Amazon chart-ranking sort of broken right now due to the scams? I don't know if that's already been washed out by now or what, but I do know those $89/etc scams borked the numbers for a bit.
Something to think about anyway.
As for retail, GAF's resident Best Buy DM has confirmed that PS4 has retaken the lead by a comfortable margin once again (this guy is known to GAF or those that read the NPD threads each month, and is quite trusted).
"Interesting".