From the beginning of last season to the present, he went Retroflex -> EF4 -> Axis -> EF4 -> True. So, I wouldn't be surprised if he didn't like the changes made in the Axis and EF5 line.
I have yet to see a pair in person, but I have been told the True 12.1's are basically a rebranded clone of the EF4. If true, that would make the transition into True less ambiguous.