Some people (like me) are using the release of 2.3 to harp on Samsung/at&t for not having 2.2 out already. Froyo has been out for a year- the Captivate, half that long. It should have been on there at launch. See what I mean?
Android (and even iPhone) users are, generally speaking, techies. Manufacturers know what techies want- the latest and greatest.