I cannot agree with this at all. With 3e (and now with 4e) I saw a very distinct shift in attitudes, and particularly a much greater emphasis on "RAW".
I've seen no dramatic shift - just a consistent pattern of growth through the editions.
In older editions it was just accepted that the DM would have a binder of house rules, and that the game would differ drastically from table to table. With 3e this ceased to be the case.
I think that's just incorrect. As an ironic example - much of this website's content is (and has always been) devoted to development of house rules, and discussion of how we differ from table to table. I see very little such expectation here, or when I play with folks outside my normal circle of gamers.
A lot of this was undoubtedly that 3e was a much tighter system where the older editions were, to put it mildly, a bit of a mess.
3e was a tighter system, sure. But the growth pattern from OD&D, 1e, 2e, and onwards is pretty obvious. And that pattern was by no means unique to D&D. Between 2e and 3e we had a longer gap in publication, but we saw the pattern instead expressed in White Wolf (which, for all its "storytelling" bent, has a pretty tactical ruleset), and Shadowrun, among others. It seems to me to have been an industry pattern, not just a D&D pattern.