^there's always exceptions but generally bigs don't shoot very well at the ft line, wilt chamberlain was a career 51% ft, manute bol haha was 56%, i forgot who it was, maybe reggie miller, but he gave the same explanation i did and it makes sense, to me anyways. the tall players that are good ft shooters are generally good mid range shooters too, like pau gasol, dirk, yao ming. you're probably right too that euro bigs are taught to shoot more than american bigs. shaq, dwight, etc are more back to the basket bigs where they utilize jump hooks, dunks, and floaters so they really don't have a 'jump shot' so once they get to the free throw line...they don't have that natural jump shot arm movement.
btw, on youtube somehow posted a video of dwight and lin talking at the end of the game lol.