Yes, to be fair, although Quake 2 had the best AI we'd seen to date, it was a marginal improvement over what had come before, and when Half-Life came out, the bar had been raised to a whole new level.
Someone noticed that I hadn't said anything bad about HL2. I'm trying harder than I used to to avoid dissing on games - it's kind of lame for somebody in the industry to dis on other people's games in a public forum, for one thing, and it's too easy, for another. Get a couple game geeks together talking about a game and the first thing they start pointing out are its flaws. We just can't help ourselves.