Dassault's grand experiment with the Boeing 7E7 is just getting started, so it's too early to point to results.

FORBES: 7 Digital 7

Boeing claims the 7E7 would cut fuel burn by 20 percent over current aircraft and save airlines 10 percent on overall operating costs, citing new, fuel-sipping engines and lightweight materials that will also cut maintenance costs.

CNN: Airlines warming to Boeing 7E7 jet

During the meetings, airlines have made it clear they want at least two engine options on the 7E7, bristling at the suggestion that Boeing could sign an exclusive deal with one of the three main powerplant manufacturers to save money.

CNN: Airlines warming to Boeing 7E7 jet