No it's not the users, I just think almost everything they produce looks... well, not good.
Not 'bad' either, but not good. You really can't expect people born and raised around American culture and thought in American art styles to do very well with eastern art. with few exceptions, you can just tell something was made by an American just by how derpy it looks, for the lack of a better term.
I guess you could say it's like a accent, people who study a language for years and years will still usually have noticeable accents no matter how hard they try to overcome it and replicate the native speech style.
If you like the stuff they make or you can't notice a difference, more power too you bro. I just can't.. as much as I'd love to get some custom artwork done for a daki or poster or whatever, I really rather not go to anyone on deviant art for it, though there might be some artists that have overcome the western influence problem on, and if I found one sure I'd see if I could commission them for something. Even though they'd probably overcharge out the ass for it then upload it publicly to boost their street creed, which is another issue I have but most probably wouldn't mind too much, and which I bet a lot of Japanese artists do as well to be fair.