When we were at Disney in Jan. '02, we visited Millionaire four times. First time we all got all the answers correct, but didn't know the trick to getting the fastest score. By the end of that first visit, I noticed the person next to me, tapping on the button before all the choices had been revealed. I learned that if you know the answer (and it's A, B, or C), start tapping on that choice before the rest of the wrong answers are revealed. If you know that A, B, and C are wrong, lay on D immediately. That way when the D choice is revealed and the computer starts to register everyones answers, your time choosing the button will be greatly reduced. The next time we visited the attraction, I ended up number 2 and my 11 year old daughter number 4 at the end of the show. If the show had lasted a couple more questions, I may have moved into first (assuming I had the correct answers). The fastest finger is the toughest part of the show, since this strategy doesn't work here........And my final answer....if you get a question wrong, forget about being anywhere near the top ten at the end of the show.
They had a couple Disney questions, some history, science, Latin, and even a math question (not an actual problem, just a question). Luckily, I had just finished my summer semester of Calculus at the time, so the math one, which was the 32,000 question, was a breeze for me. There really is a lot of luck in what questions you get. What may be a hard question for someone else may be easy for you. It really was one of my greatest Disney experiences. 
I don't know why it works, but hey, I'm not aruging. 
