Actually, I have a rather interesting (and naive) theory behind that. That tavern has an air of foreboding. I'm thinking maybe it was some sort of front for a Dark Brotherhood/assassin's operation, with the patrons inside anticipating the interloper being assassinated. They may have arranged for their death as part of a quest, and deep down were struggling to keep a devilish grin off their faces as their target walked right into their trap.
Could be, but it sounds a bit far-fetched. The tavern is (I'm pretty sure) the same as this one in Riverwood: http://harperden.ru/wp-content/uploads/2011/03/SkyrimTavern01.jpg
Also, a lot of the places in the trailer has been the same as in the screenshots from the GI-article, so it makes sense. I doubt the Riverwood tavern, where our Dovahkiin meets the lovely barmaid, is a conspiracy operation thing for the Dark Brotherhood...
Sounds more simple that the AI is simply just not that good.
We'll have to wait and see though to be 100% sure, like with a lot of things. Perhaps E3 will make things like this AI question definitely sure.