How many of those announcers are former players that used to play for teams that got burned by the Broncos in some fashion at some point in their career? There could be a deep resentment on a personal level.
In any event, I don't mind too much. I'd rather see Denver stroll into any situation, kick some ass, and walk away with a win without worrying about a bunch of hype and general genital slobering that some of these analysts commit themselves to.