To Flight Safety:
Entering Low Level Windshear of sufficient magnitude, can definitely give you an AOA way beyond Alpha Max as several windshear crashes have shown, no matter what your GoAround attitude and thrust.
Therefore it is quite possible that the AOA protection was actually saving the a/c from worse, just as it did in Habsheim.
However, having flown both the B777 and the A330/340 I have to say that my "OPTIMUM" a/c would be a B777 with the envelope protection of the A330/340.