Did a bit of research - should do more of that before I post, eh?
Appears microstudder may be impacted a bit by PCI latencies, but also exists on single-card, dual-GPU configurations. Information here: http://www.tomshardware.com/reviews/radeon-geforce-stutter-crossfire,2995-4.html
The thing I didnt expect to see - micro-studder appears to be more apparent in a single-card, dual-GPU configuration, than in a dual-card, single-GPU per card, configuration.
So I guess going back to the initial question - does anyone know if the "virtualization layer" that "Virtu MVP" appears to provide impact micro-studder in any way? Wondering if it "smooths" out the effect, effectively reducing it, has no impact on the micro-studder effect, or maybe makes it more pronounced in some way or under particular circumstances.