True 'nuff, but the problem is that promotions are limited when one is only fighting barbies and they are not as organized as the regular AI, which makes them weaker than the Little Sisters of the Poor.
It's shooting fish in a barrel.
Edited to Add: And Terra maps are almost a cheat in that the Human player knows there is an entire continent out there somewhere. Race to optics, then Astronomy, and the game is over. The only exception being the finding of the Fat Lady to come and sing.
Alll that being said, I love playing Terra at levels harder than I normally play on because I can get the win.