What, you mean you missed the count down to third edition in Dragon? It talked rather explicitly about what was going to change, if I recall correctly. So it's not like WotC was saying "look it's gonna be AD&D1st" and then pulled a fast one.
For my part I felt and feel that D&D3e returned to focus on many of the thematical elements that defined 1e, ie Back to the Dungeon, as their catch phrase was. I never ever got the impression that it would actually be AD&D1st, but rather an updated rules set, based on many of the same assumptions that made AD&D1st fun to play.
Having being reared on far more customisable rpgs than D&D3e, I feel that they still make room for archetypes, what with being class based and all. A side effect of that is also that I've been exposed to quite a lot of other gaming systems, and find that AD&D1st and D&D3e has a lot more similarities than what I think many give them credit for.
Ah, so I see you play the "alot of other people think so too" card. Well unfortunately, based on the success and praise for D&D3e, a lot more people don't think so too, so that card isn't as powerful as it could be if you had the numbers on your side. Which makes the "a lot o people think so too" rather moot.
M