Full results here.
http://www.nba.com/2015/news/04/21/hawks-coach-mike-budenholzer-2014-15-coach-of-the-year-official-release/
That's interesting that the top four coaches are either rookie or second-year head coaches. It's even more interesting that the third and fourth place coaches were coaches of the sixth and seventh seeds of the playoffs, both with less-than-stellar levels of talent on their rosters.
Yes, I think you have a new generation of coaches who do a really good job. Atlanta in particular punched above its weight during the whole season thanks to excellent coaching.