hammystyle
Starter
I'm not nearly as convinced you are about how meaningful Johnson's career winning percentage is. He inherited a team that had won 50+ games 4 straight years and was in the playoffs each time. Under Avery they won 5 playoff series in four years while under Nelson they had won 7 playoff series in the preceding four years.
Johnson never coached a team that didn't have the following players: Dirk Nowitzki, Josh Howard, Jason Terry, Jerry Stackhouse, Erick Dampier. His teams also had either Devin Harris or Jason Kidd. That's 3/4 of your rotation right there composed of very solid to all-star players. Sure, he averaged 60 wins a season (factoring in his 16-2 partial season) but Kenny Natt could have led those teams to maybe 55 wins per season. Is Avery a better than average coach? Probably. But touting his winning percentage without pointing out that he was given a long-tenured, playoff-quality team every year he coached is ignoring the big picture.
He took a very good team and took it to the next level. That's not easy to do. I'm touting his winning because even though the circumstances were favorable, its spectacular. Like I said, I'm pretty sure its the best of all time.
Kenny Natt was not taking that team to 55 wins a season. That's what Don Nelson was getting out of them.