An article in one of the U.K. RC publications basically threw out lift via pressure differential, citing some rather compelling examples...
Instead they ascribed lift to Magnus Effect and associated characteristics... an interesting read...
[link=http://www.grc.nasa.gov/WWW/K-12/airplane/cyl.html]Lift of a cylinder[/link]
As a rough synopsis, the article postulated that lift is the result of a rotational force on the air, giving rise to the Magus effect, and not related or dependant upon classic wing zone pressure differentials at all.