I would agree that there is definately some long hours of training required to be proficient at leg kicks. So I'd agree that even a great fighter like say Rich Franklin isn't going to be nearly as efficient at snapping leg kicks as someone who has spent years doing it. That being said I don't think we are talking about years of training like world class boxing takes. I'm often suprised that some of the top notch strikers do not use it more often. Mirko is truly one of the most perplexing fighters ever. He will run off a great string of wins then just seem to completely not show up one night. My point in the earlier posts was that in kickboxing or MT the leg kick is a great neutralizer to a boxers typically superior hands.