Looking at NBC's long list of sitcom hits, going back to Seinfeld and The Fresh Prince, to more recent ones like The Office and Parks and Recreation, I rarely, if ever, see Scrubs mentioned. It may not be as strong as the ones I mentioned, but I don't think it gets the recognition it deserves.
I think it's under-appreciation has more to do with it's network scheduling and distribution , when it was released . I think it flew under the radar . And I came across it through word of mouth , a few years after it previewed . It's a lot like MASH , and had a great cast too ! The producers would be a great choice to develop a new MASH Show (with an Iraq/Afghan background)!