SweetiePie:I am robbed of this appreciation while looking at my keyboard.
Looking at the keyboard is always a mistake and waste of time. Touch-typing is an essential skill nowadays, although many don't realize this. If someone is not willing to sacrifice the rather modest time of several months to learn to touch-type, he/she will eventually lose lots MORE time throughout the rest of their lives by having to look at the keyboard while typing.
It's like running with chains on one's feet, while chatting without looking at the keyboard gives you perfect freedom, while also being less intrusive than direct voice chat over Skype.
PS: I don't understand Jay's point at all. Even multi-player rounds without any chat make perfect sense, because you can still compete with the other player(s), compare your shots with theirs, etc. Chat is really only secondary and not necessary in multi-player rounds.