I can ensure there are more than three airlines having ordered the new Airbusses.
Lufthansa ordered eleven A340-600, Virgin ten, Swissair nine, Aerolineas six and Egypt Air two.
Air Canada also ordered A340-600s, but also A340-500, unfortunately I can't tell you the exact splitting right now.
The A340-500 has been ordered by Singapore Airlines (five) and Emirates (five).
SIA wants to start SIN-LAX nonstops, Emirates will use it for DXB-New York as well as for new nonstops to Australia.
Beside the orders above there are many more options.
I don't know if your last sentence contains any doubt or irony on the new types, but I can ensure Boeing is still waiting for any customers of their B777-200X/(300X)-ultra longhaul aircraft.
And with SIA, Emirates and Egypt Air already three current B777-users decided to order four-engined Airbusses for their ultra-longhaul services...
Me & You & a Plane Named Blue...