There was some research that showed people who typed with fewer fingers could be just as fast. However, I am surprised that anyone could achieve 100wpm with no training.
I've never done a ten finger / touch typing course or something like that (so, no training) and don't have problems typing 130 WPM 98-100% accuracy in one of these typing tests without specifically practicing typing tests. I don't have ten working fingers.
But yes, they can be fast in short bursts.