I think it's Tessa's extensive ballet training and their ability to connect to each other so well that gives Virtue and Moir the big advantage that always landed them on top of Meryl and Charlie. Besides, V & M have much better edge quality, musicality and flow, the only couple out there that reminds me of the sheer magic of Silverstein and Pekarek. I personally prefer Davis and White, so it's to my dismay that I must acknowledge the other team's superiority, but I hope in time Meryl and Charlie will be able to catch up to the expression level of their teammates.