To report back after a few months, the "sudden death" lack of acceleration is completely gone. No more romping the peddle to have nothing happen.
One thing that still bothers me, is loss of power in a turn. It's most noticeable in Sport Mode. If I'm already moving, say anything from 5-20 MPH, and make a turn and hit the gas, it just does .... nothing. Tried it with stability and/or traction control off, same thing. Only way to describe it is complete lack of throttle input - not loss of power, I don't think, but no application of MORE power.
It's horrible in Sport mode - counter intuitive to say the least. And it happens once in a while in Drive.
Calgary, sorry for the delay in answering, but have you checked for the chafed knock sensor wires? Are you running 87 octane, or 93?