[comex]

For the record, OS X actually doesn't have a lot of buttons called "Advanced", though there are some. In fact, in general, as an OS X user and former user of Gnome 2 applications, my unscientific impression has always been that Gnome 2 had significantly fewer (user-visible) preferences. YMMV...

[glhaynes]

OS X apps don't use a lot of "Advanced…" buttons but they certainly have lots of "Advanced" tabs (usually rightmost, having a gear icon) in their Preference panels: iTunes, Finder, Safari, and Calendar all do.

Where you do see lots of "Advanced…" buttons is in System Preferences…

[comex]

Well, I quickly went through all of the default preference panes and here are all the Advanced buttons:

    Security & Privacy
    (Displays - Calibrate has an "expert mode")
    Mail, Contacts & Calendars - for manual mail accounts
    Network - big advanced section
    Bluetooth
    (Zoom in Accessibility has "More Options...")

So there's a few of them, but I wouldn't say lots.