Maybe a little friendlier to the Avs than they deserve, but with the author having spent every day writing about them for so long, and during a time when they were so exciting to write about, it stands to reason that he has a bit more to say about them than the Wings. I wouldn't go so far as to call Dater a "homer," but he's on thin ice (pun intended).
As a Wings fan, myself, the Denver perspective was interesting at times, infuriating at others. I found myself wondering how this book would be different if it had been written by a reporter from Detroit -- or, better yet, a neutral third party. Someone who cares about sports history, but but has no direct connection to either team. Perhaps this would have meant fewer, or shorter, or less interesting quotes from coaches, players, and members of the media, who were probably more willing to talk to Dater than they may have been to talk to some random historian -- but it also would have meant fewer pages spent on the trials and tribulations of Dater's personal life. All in all, I would have considered that a fair trade.
(Oh, and he could have cooled it on the Woody Paige quotes -- according to Dater, the worst thing a sports journalist can be is a "homer," but from a layman's perspective, I don't really care about that. What I do care about is the constant attacks on not just Detroit's pro hockey players, but it's everyday citizens. Paige's quotes are often vile and mean, and Dater's constant use of them comes off annoying.)