I don't think I'd be doing much different in my daily routine if I were to adopt your experiment full time. I rarely speak to people, often a look will say more than words could.

When I was younger, a friend of mine and I would only talk on the phone using single words, mostly to throw off eavesdropping parents. Conversations went something like
Hey
Sup?
Party
When?
Saturday
Cool
Smoke?
sure