Wiggins was ranked ahead of Exum on the Jazz big board, I don't know how big the gap was between them in the eyes of Dennis Lindsey and company but if we were trying to move up to get Wiggins don't you think that maybe Dennis and others in the front office see something we don't, in Wiggins?! Having said that I believe Hayward + Exum > Wiggins.
Before the draft we had no inkling that Exum would fall to 5 or Dennis Lindsey probably knew from his sources around the league from what he was hearing that there was a strong chance Exum would be there at 5, and so, the so called rumor was probably kaput about 48 hours before the draft because what Dennis Lindsey knew, that he wouldn't have to trade up to get a top tier guy, that guy (Exum) would just fall right into his lap. Probably the reason it was so hard for Dennis Lindsey to hold back a smile at the press conference following the draft because if you watched the two or three press conferences before that one, Dennis looked stressed out especially with the knowledge that the top tier guys would all be gone by the 5th pick, in those press conferences between that time.