To me it was that last stat that matters. It's not a better winning percentage than everyone else- it's winning 65 or more games that makes these teams great.
Any team that can do that is at a level well above the other teams- it's not impossible to beat them, but it is so difficult that most teams can't do it at all, let alone more than once in a series.
The other two teams out West know that Dallas is out there, and they have to question whether or not they can beat them. It appears highly unlikely that they will get home court advantage- and will have to win in Dallas on their home floor.
The Suns can score with anybody, but so can Dallas- the Suns can't run away, and have less of a chance of stopping Dallas than the other way around.
The Spurs are more experienced and a better defensive team, but don't have the speed to keep up with either Dallas or Phoenix. IMO, the Spurs need another inside player to counteract what the other teams do, and they didn't get one.