Confidence with Keys

Something that is interesting to pay attention to is how people type on a keyboard. Can they type quickly without needing to look down or do they use one finger at a time. There's a man sitting in front of me in the library and he types with his two pointer fingers, one letter at a time. He's also not graceful about it. He pushes down harshly and I'm a good 10/15 feet from him and I can hear his keys protesting. Versus to the left of me there is a girl who is typing, she is using all her fingers and is hardly looking down, she is confident in what she is writing.