The statement...
"It (E-M) is better. Comparable or better than every Western fourth-generation fighter out there,"
... is still hard to reconcile with the infamous WiB report, that describes E-M as being inferior to that of the F-16 Block 40. It was also (at the time of Flynn's statement) rather difficult to see how the F-35's E-M would be "comparable" (and when you say "comparable or better" you are not implying "measurably worse", are you?) to that of the Typhoon, which has 20 per cent more wing, 5000 lbs less OEW and roughly equal thrust.
As for the other comments - alpha, controllability/stability at high alpha and instantaneous maneuver: They do seem to mesh with the WiB report, with the difference that in "unscripted" situations, maneuvering in response to an unpredictable target rather than performing test points, the limiters and lack of E-M both made alpha, controllability and instantaneous maneuver harder to exploit.
And let us not forget the B will fly exactly as an A, with the addition of some 3000 pounds of empty weight.