A DM who was going to make up rules to keep the game running smoothly in second edition will probably still do the same thing in third edition (unless, because the rules are simpler, he just knows what the rule is off the top of his head).
A DM who is going to spend a long time looking up rules in third edition, was going to do the same thing in second edition (only it would probably take longer since chances are there wasn't actually a rule for it and so after looking for five to ten minutes he'd end up having to make one up anyway).
If you perceive that there are more people who want to "follow the rules" in third edition that's probably largely because those people simply didn't play D&D back under the second edition rules because they were too frustrating, convoluted and hard to learn/use.