Using LittleNavMap, I can see the groundspeed of the AI aircraft cruising in the flight levels. They seem really low, and it’s not because of winds aloft. Speeds around 200-250 kts for every commercial jet aircraft. Should be 400-550 kts depending on the winds. For example, my current ground speed in the CJ4 is 474 kts at FL430, and the Delta 757 following behind me is 205 kts at FL410. A 757 should be closer to 500 kts. There’s something wrong with these cruise speeds.