Hmmm. I tried that bin out and it gave an MIL (P1336 Crankshaft Position System Variation). It was noticeably less responsive. But it had to have entered PE (13.4 at WOT) with the open loop table set at stoich up top.

I put the last tune in just to be sure it wasn't a sensor problem and the MIL went away and the throttle response came back.