Yes. Flat tips do no tipstall as easily as rounded tips. As a matter of fact quite a few people have been known to remove the wingtips off of their U CAN DOs and other similar planes to make them 3D better. I did not do it to mine, but I did not keep my U CAN DOs for long before I sold or gave them away.

Notice all the Edges, Extras, Yaks, etc... they all have blunt wingtips.