@DarthEnder: Like Rock Lee said, seeing and understanding something and being able to make yourself do it are not the same. Understanding would certainly make it easier, but we shouldn't forget Kakashi is a 'genius'. That probably has something to do with why he was able to master using so many different techniques of different elements that he'd seen with his borrowed Sharingan. If the anime didn't leave out extremely informative parts of the manga I wouldn't have to talk around this issue ponder whether you implant 'genius' into someone with a magical eye?

I think a recurrent problem with the Narutoverse is that there are simply too many 'geniuses' that get focused on, it gives a misrepresentation of the abilities of the typical ninja of a given level from a given village. I look at Genma or Raido or Ebisu as examples of more 'typical' Konoha jounin and they are rarely seen using any techniques.