I second that.
Some of the takedown defenses coming out of the striking arts are laughably bad.
To me, take down defenses have to come out of grappling arts. It seems like a no brainer to me, but that might be because my art of American Karate didn't have any take down defenses. (someone else's American Karate might, mine didn't)
I'll say one thing, take down defense in the UFC sure has come a long way. I really love watching someone with good take down defense. Must be so damn frustrating trying to take a guy down and not be able to do it.