It took me some time to find out whats going on. The AI plays craps (as cakewalk) on custom maps, even when I give them top homeworlds, there hapens nothing. When I press "turn", I can make the next decisions.
But on random generated maps, the AI plays quite great. Between the turns I can realy feel the AI computing its next turn, as it always take some seconds before I can give new orders again.
There have to be done something. I dont like the random generator as it keeps creating odd galaxies, so I have to stick with custom maps, but they wont work.