Pretty simple math. If you do something 100% faster it means you get it done in half the time. It doesn't mean it doesn't take any time. I'm not denying that it's a strong trait. It's just not as strong as you might think. Your 100 science a turn assumes that all of your spies are in the field and nobody is running operations reconnaisance in your HQ, and missions still have a 100% success rate. That's not going to happen.