In the world of tv right now, Scrubs ranks up there for a few reasons.
1) It is funny
2) There isn't much to compete with in that area because some channels like FOX dedicate all their prime time to who will be the next American IDOL.
3) The Janitor.
But some stuff has sucked about it, like Zach Braff is a bad actor. I watch the show for the other characters. The musical episode was awful and I turned it off after they started their 2nd song.
But all in all, compared to some of the stuff from way back in the day like Married with Children, Scrubs wouldn't stand a fighting chance and would have been cancelled in like a week.