I thought that, on regent level, the AI's research rate is even with yours. However, when I tried playing a game on regent, when I met one of the AI civs, they were alaways 3-6 techs ahead of me. What's worse is, I didn't have enough money to buy any of the techs. The only time I could get a tech from the AI was when I did a per-turn deal for their least-expensive tech that left me with almost no income for the next twenty turns. I usually have about 3-6 cities by the time I meet someone, with a worker for each city, and I am making about 5 GPT with the science slider set to 50%. If the AI recives no research boost on regent level, what are they doing that I'm not that is getting them all of these techs?