The new AI cheats...
Cruel and Vicious
We all know that both the new AI difficulties get Resource bonuses. But did you know they also get research bonuses...heck even building time bonuses?
I play on slow. It takes me slightly over 7 mins to complete my first research.
In those 7 mins...the Vicious AI had 19 and 15 combat reseraches done. Cruel had 5 and 8. Hard had 1, just like me.

Now Ive not seen any documentation about it, So Im not sure its a bug or by design. Heck Im not even sure its a problem. I found it interesting though.