ORIGINAL: InboundLZ
My understanding is it serves two functions. It allows a lower approach speed (lower stall speed) and allows for a higher AOA. This has been my experience.
I believe ''crow'' is a term coined by the sailplane guys as they use it all the time in thier sailplaines/gliders as Bob indicated below....
Nah, the total lift available from the wing is degraded, actually requiring a
higher approach speed. For the offsetting benefits which make crow worthwhile in some apps, see below.