Nick
Just in case you thought otherwise, my post about pressure calcs was to support your thoughts that it's nothing to do with it.
This is one of the best threads we've had in ages.
Here's another for the list, a wing acts like one half of a venturi !
http://www.grc.nasa.gov/WWW/K-12/airplane/wrong3.html
Don't think anyone else has offered that one up yet.
V.