My theory is that tapered wings are more prone to tip stalling because the tips have a shorter chord than the root and stall at a slower speed.. If the wings are matched in wieght and in design however they should stall together. I also know that a heavy wing/wing tip WILL stall before a lighter one just as a plane with heavier wings will stall before an identical plane with lighter wings.. I also know that trim and engine thrust may play a role when you get down to the nitty gritty.. Only we as R/C pilots take these planes to the edge at such low altitudes on a daily basis.. I could be wrong on some of this though.. One thing I have realized from the first time I logged onto R/C universe is the wealth of Brains and intelligence.. I am glad that I enjoy a hobby that is so technical and I guess that's part of the reason we get so much out of it..