With all due respect to Stardock, I'm surprised that AI is cheating. I thought the devs were proud of a non cheating AI, except for the acknowledged boost to resources and such when changing difficulty level.
The cheat is also very obvious to spot, when you are on it. This is about sensor range of AI ships versus the distance they start chasing your own ships. If you eliminate border/dubious cases where the AI might have sensor range from another of its starbase, ship or planet, you rapidly see that AI, once it starts chasing one of your ship, maintain the chase at 4 to 5 time the distance it should spot you.
Pirates do cheat, but regular AIs too. Just move a faster ship just outside interception range of an AI ship, then start moving away until you are well into fog of war (outside detection range) for half a dozen of consecutive turns. You'll see the AI still pursue your ship, even in the midst of your empire where you have full intelligence on all hexes and clearly see only this AI ship is there and can't possibly see you.
Now, I'm not throwing stones (that much in fact. I'll play with that... But I'm surprised over this 'feature' as I believe the devs were proud of their AI, in GC2 at least.