Ok there are many facets to this topic that I would like to point out:
1. One of the reasons that those teams are also winning, is there defense. You try to make it seem like it is all offense, but there is a lot of play on the other side of the ball that is going to deciding the game. By not giving PHX and Boston and Orlando credit for their defense, is kind of a slap in the face IMO. They play good defense, and deserve credit for it.
2. I agree that a purely ISO offense is not a good thing. But I do believe there is a time and place for it in games. If you ever have a matchup where they aren't doubling one of your go to guys, and you can get that play over and over again, there is no reason not to ride it. The idiocy is when it isn't working and they don't go away from it.
3. Many other teams have multiple offenses in their sets. Motion offense. Sets to attack zones. They just don't run ISO's all the time. Denver has several different offenses, and they swap back and forth all the time in the game depending on what they are facing and who is on the floor for their team.
4. PHX isn't a 7 second or less offense anymore. In fact I would go so far as to say they are built more like Orlando now, than the Steve Nash team from a few years back whe D'Antoni was coaching. Both teams have one good interior player and spread the floor with a ton of shooters, and with the spacing, let the point guard do his stuff. The difference is that Orlando runs more isolation plays for Carter in their setup. That is because with Carter, you can do that. With Richardson, not so much, he needs set up. Both of these offenses remind me of the offense Houston ran with Hakeem Olajuwan. Not quite the same, but very close. (The difference obviously being, Hakeem...).
5. Boston runs a motion offense but still controls the pace of the game. The reason they are winning that series on the offensive side is they are letting their PG control the game. He views the mismatches and the defenses being ran, and sets up whatever is needed to get a score. He pretty much totallly wings it. When you have Paul Pierce, Ray Allen and KG on your team they have enough experience they know what to do when the time comes. They aren't pushing it up the floor. They are controlling it.