1. A caller adaptive voice response system which adapts to a conversational pace of a caller, comprising: (a) means for measuring an amount of time indicative of the time required for said caller to respond to a voice message spoken by said system at a predetermined speaking rate; and (b) means for adjusting a subsequent speaking rate of a subsequent voice message to be spoken by said system, said adjusting means being responsive to said measuring means so as to increase said subsequent speaking rate of said subsequent voice message if said amount of time was shorter in duration than a first predetermined amount of time.