I witnessed a tricycle Virus (essentially a short wingspan Lambada) towing at the World's in South Africa over ten years ago - that was at high density altitude, but from a very looong runway. Take-off runs were notably long, but otherwise the tows looked fine. It would be interesting to hear reports from any participants.

My own perspective is that power rules (maybe I've lived in the USA too long!) and that the quicker I can get away from the ground and off tow the better! I have fond memories of my ASW-20 being dragged skyward by an Ag-Cat that, if I remember correctly, had a giant radial engine of more than 450HP..

Mike