look at the thai's. all that conditioning & for the most part they're retired at an ealy age.
just to add to the arguement.
to deal with any kick just take half a step foward & you get past the piont of maximum force, it may still hurt a little but should not stop you from pummeling there head, especially seeing as though most thai/kickboxers have a tendency to drop their hands whilst kicking.
there are lots of other things i could say that they do wrong for street encounters but if i tell ya everything you won't learn for yourselves.
vts
[disclaimer- i am about to be rude, antagonistic & terribly offensive- but i love ya's all]