I agree, but I will tell you what I have read on the subject. A squared off wingtip is supposed to lessen tip stall in high alpha manuevers. A rounded tip is supposed to be better for IMAC and pattern flying. A horner tip, such as the Cessna 182, is supposed to lessen stall effect, and allow for slower stall speeds. I'm not sure how a tip like you would find on most Stick type planes and the UCD planes is supposed to react.