To tell you the truth I haven't read much of this thread but I think I know what you are discussing, so I'll give my bit. I think something to remember is that even if said martial art was created in a said country, the person that created that martial art probably adapted it from another martial art. Kalarippayattu which started in India could be said be almost the closest thing to the original art, which was then adapted into Chinese Kenpo (I may feel really dumb after saying Kenpo) when taken to China, which was adapted into Karate when taken to Japan. I'm not quite sure if this is part of the lineage you guys are referring to, but if not... Then if you are talking about the person, lineage could matter. Do you think you would better understand a martial art if you were taught by the person who invented it or even that person's first disciple rather than someone who learned it from someone, who learned it from another guy? Probably. As information is passed down, it tends to change some,and so did martial arts. Referring to my first rant in this post, how do you think Kenpo started? Someone taught a person Kalarippayattu, which he/she may have changed a little, then taught it to another person, who may have added something and then passes it down, etc. But I do think training in the homeland of the art you are learning would yield better results, mainly because that would be where the tradition of that art would be held up the most, and be the most undiluted.