I've played well over 500 hours of Skyrim, and I don't see anything that makes the NPC AI good or special. They just walk around on schedules and play back pre-recorded lines. It's all marketing speak!

Follower NPC AI is among the worst ever.[/quote]

That is actually a fairly ridiculous statement.

There is plenty they do very well. The problem is, the better AI gets, the less you notice it precisely because it looks normal.

For example:

Weapon Selection
Points of Interest

Sure, there are things they could have done better... but "worst ever?" Not even remotely.