This all reminds me of the recent astronomical debate to decide upon the fate of Pluto. Planet or planetoid, i'm sure Pluto really wasn't overly concerned.
Whatever definition is selected to accurately describe X2, it is a significant step in pioneering aviation. This makes Kevin Bredenbeck a pioneering aviator. These flights have demonstrated that a machine with low disk loading can achieve high speed flight without significant compromise to its low speed performance. Ultimately this means that ABC technology can filter out to EMS and other arenas where the ability to get to destination is as important as the ability to hover over or land at destination. I doubt the beneficiaries of such a service will concern themselves with how the machine is defined...