I see, however, that if you click on the title of the thread in the game forums it doesn't take you to the game page, which is a little confusing unless the game is mentioned in the title...
edit - or in the post. If you just click on Matt's "Sci-fi fans", for instance you won't go to the game page, and if he doesn't mention what game it is, well, you could get lost....am I making any sense?
In threaded mode, it's hard to keep track of what game the topic thread is linked to... so quite easy to get mixed up in discussion.
In flat mode, you're only viewing a single thread at a time, but there's still nothing at the top of reading that thread to tell you what game the discussion is about.