Changing Estimated Hold Time Message from Max Q Time to Average Q Time

When callers sit in queue, they hear "your estimated hold time is x" and that time is based off Max Queue Time (longest call in the queue). We're worried our callers hear a long wait time based off a single call, and than hang up. If they would've waited another minute or two, their call would have been answered. We would like our callers to hear the Average Queue Time (which is often minutes shorter than the Max time) instead of the Max Q Time.