I dont think so, but I think developers used to invest much more time into balancing and fine tuning the AI / gameplay which gave the player the feeling that the AI was just right because the level of difficulty was just right. Technically, the huge advances in CPU speed and AI algorithms should rule out any possibility that the AI nowadays could be worse than 10 years ago.
Generally my impression is that most new games nowadays come with pretty amazing engines (including AI) but completely lacking the last stage - balancing - which takes a surpisingly large amout of time - but is just absolutely crucial to the general experience.
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