Duncan keith was a #54 pick, people. He was not considered to be a top tier player in his draft year, nor an elite player for years after his draft. Comparing Buium to him at the same times in their relative careers is not sacrilege.
There is even a thread on this site comparing him and Ballard, and wondering who would end being the best Dman, 5 years after his draft(2002). Here is one quote from 2007, and he was by no means alone;
"Ballard, and IMO, it's not even close. Maybe it's because I've seen a lot of Ballard, but from what I have seen of Keith, he's been rather unimpressive."
Keith had 15 pts in 41 GP in the NCAA in his draft year.
Buium had 50 pts in 42 gp in his draft year. It's not crazy to speculate on whether Buium had the potential to be the next Keith, though a lot of his success depended on him being surrounded by players like Kane, Toews, Hossa, Byfuglien, Seabrooke, Hjalmarsson, Crawford, etc.