I personally found that there was no advertising for Geist, and quite a bit for Eternal Darkness and MGS: Twin Snakes. However, the problem here is that my TV viewing patterns are always changing, and marketers are always looking for new audiences to tackle, so maybe Geist had heavy ad rotations on some channel I don't watch, or during a show I don't like.
In the end, none of the three games got a huge advertising blitz or anything. Nintendo could afford to push some of these games more.