There are a couple of reasons why we're all on different pages, I think.
1. The size of monitor you have - I think that the forum 'autosizes' to fit whatever screen size you have, so obviously you'll get more information displayed on a 19" monitor than a 15" one.
2. There is an option in your Control Panel 'Edit Options' to state the number of topics and posts per page. Mine is set to display 30 topics per page and 25 posts per page.
Any clearer?