The answer is in "Yournewchef"'s post. I bet he just hurriedly made this article, cause there is no way that Wade will not be top 10, heck, even top 5 in his prime.
Maybe they put into account Wade's age and style of play... i honestly dont expect him to have the same style of play he has now in 5 years when he is 32 (born jan. 1982) Yeah... Wade is old, or at least older than those guys on the list... he went to college for the full 4 years. So maybe the writer just wasnt sure how a change in style would affect DWade's game and if it would be enough to over through the younger guys he mentioned on the list.