It is interesting to point out that LFL intends for ALL Star Wars properties to be canon, from the acquisition of LFL by Disney onward. This article (and others) state that "Creators of new Star Wars entertainment have full access to the rich content of the Expanded Universe". Although it doesn't mention X-Wing specifically, the close collaboration between LFL and FFG is very instructive and almost certainly means that those ships drawn from the EU and put into X-Wing are newly Canonized, since LFL directs what ships can and cannot be included in this game.
Again, this could (and according to legitimate sources probably does) mean that X-Wing ships are truly Canon, regardless of their original source. Which is really cool, especially when we see some of the more interesting pilots, ships, and upgrades.
Maybe we will see "Genius" at some point in Star Wars Rebels? Could be amazing.
Original Article: