Very interesting Kevin. That could explain why all the tuning readings done by pinging were sharp by 6 to 9 cents or more.
Based on the fact that you can bend a note with high pressure, high air flow, I agree with you that bending is about having a higher pressure on one side of the reed than the other. The reed still vibrates back and forth, but it does so off center and perhaps with a longer stroke on the low pressure side than the high pressure side.
That is my thoughts just based on common sense. But I could be all wet.
Regards,
Lowboy