I actually prefer to communicate with potential clients through e-mail for screening. If I am not getting all the information I need I ask for their number and call them. I had one family that sent me a questionnaire through email. I replied with all the answers and they came just for a short interview (maybe less than 20 min). They were a great family. Picking up earlier, paying with post dated checks, etc. I prefer to spend my afternoons and weekends with my family or getting things done than getting chased or chasing potential clients through phone calls. With emails parents and I can communicate when we have the time.