Nick
We don't demonstrate jackstall in the 350 as was done years ago on the Gazelle. We do a lot of low flying, however, and your bird avoidance scenario is what makes me wonder where that jackstall threshold lies. I shall certainly be seeking information from the people who ought to know about the more murky corners of the envelope.
Cheers
Dak
PS American was certainly best when it came to producing a certain twin engined fixed wing beauty - you called it the Skytrain. We named it Dakota.