Phone calls are very hard for us. We don't have someone available to hang around the phone all day and if we're out in the shop, etc, obviously we will not answer. Email is a far, far better way to contact us. It's much faster and helps us remember who we talked to and what we talked to them about. Phone is simply not ideal most of the time.
As many in here have said, we will respond to emails very, very fast. Much faster than the vast majority of any other company in the industry will. It is not unusual for us to exchange several back and forth emails with a customer within a 24 hour period.