In X-Plane 11 beta 2 when the AI pilot flies the Cessna 172, ATS says: "Cessna 172 climb to ten thousand"
As climbing to FL100 is quite a challenge for the Cessna 172, I wonder whether ATC considers the plane type it commands.
Since X-Plane 10 ARC can do less than in previous versions, and what is does is done worse. (I had sent some positive examples for ATC to Austin some times ago, but maybe he had just disposed it).