I have owned the 24mm f2 ais, 28mm f2 ai, and 35mm 1.4 ais. My 24mm is a bit loose, but not sloppy. The 28 is wonderfully dampened much like my 50mm 1.2 and 105mm 2.5. I don't have the 35mm anymore, had to be returned because of lens separation at the edges but it was also very nice handling.

I guess it depends on the level of abuse and the conditions it was used/ stored in. Sometimes even new old stock lenses have problems and have to be cleaned of the old grease that sometimes may migrate around.