I've eaten at Johnny Rockets in the states (only once, because there were NO other options), and they were nowhere near the quality of the burgers in the Burger Cup, even the ones who were eliminated early on.
I'll pass and stick with the Final 4. Not even Red Robin would be as good as some of the burgers I've had here in Beijing.
If they go to 2nd tier cities they may be more successful, but I don't think they'll last long in Beijing or Shanghai.