Apparently I didn't look hard enough (nor long enough, nor fast enough - insert "That's what she said" comments here ^^^^). Looks like the drivers for AMD's Catalyst Control Center vsync force options have been bugged in Win7 (and assuming Win8) for quite a while now, and a 3rd party software like D3Doverrider is needed for this kind of functionality.
So? did this erd party program fix your issue?