I really wish everyone would stop talking about mobile access like it's this entirely new thing that's never been done before. Using facebook from a mobile device is absolutely, 100%, without room for debate using "the web". Sure it's a mobile device, but it's still HTTP and it's still a mobile browser based app. Just because it's not a "desktop" version of a browser does not mean the access isn't "web".
The issue with mobile is the limited screen real estate and the impact that has on being able to place ads. The mobile environment is different from the desktop environment, so it makes sense to distinguish the two. But you're right, calling the later "web" is a misnomer.
