I don't like killing sacred cows, so for this reason I am not afraid to say that yes, for me 4e is not like D&D has always been in many ways, and I don't care how many disagrees, it's just my own gut feeling.
That said, it sounds like 4e is going to be a perfectly viable RPG ruleset, therefore I am certainly interested to try it out (probably a few months after it goes out, hoping to possibly avoid the typical error-rich first print), in the same way I would be interested to try other systems if they seem good.
Note that
I don't like killing even the sacred cows I personally dislike: I'd like them all to stay, but to have easy options to replace them IMC, without forcing everybody else to my own preferences.
The feeling I'm getting when discussing about it, is that every gamer has had at least a couple of things they always
hated about D&D, and they would like the rest of the world to conform with them. Hence you get all these "kill the sacred cows" gospel chants
But at the same time, everyone undoubtedly also have always had things they always
loved about D&D, which are sacred cows as well, but obviously they'd want those others to stay...
That is basically the reason why so many rollercoaster feelings: excited/aroused by new changes, "kill them all"... until oops they've killed my pet cow too, I hate them!