I wonder if Wolfenstein has a different field of view. The normal angle is 90 degrees, but some games will have a different one.
I remember that being the case for Half-Life 2, as the angle was 75 degrees (so you had less peripheral vision, hence a smaller FOV). There was a whole blow-up about it as quite a few people were getting sick. The developer added a fix so that the angle could be changed, but claimed that by doing so, it took away from the realism. I couldn't get more than 5 mins into it without feeling completely nauseous, ended up giving it to a friend.
EDIT: Yep, just googled it, and looks like Wolfenstein has the same FOV problem. Fantastic!