It's not about the success of "sales" - it's surely an indication of how far ahead of the KC-46A the Airbus MRTT actually is.
The US could have had that advantage - but, of course, Airbus fell foul of the 'not made here' attitude, and the subsequent political machinations that distorted and biassed the whole procurement process.
The fact that the Australian KC-30A is refuelling an F-35 - obviously months, possibly years, before a KC-46A gets anywhere near doing that successfully - just reinforces the gap between the two tankers.
As I said on 10 Sep,
Should have bought the 'bus! Would have been pumping real gurgle-juice into real aeroplanes by now.
airsound