CSAT For Talk

According to our rep, CSAT for live phone calls isn't currently supported, leaving a potential blind spot in our CSAT reporting.  Other than the rep asking if we've resolved their concern, we are not currently measuring CSAT on calls, but I think it would be a neat feature to be able to 'toggle' survey sampling in the Talk settings ("Enable CSAT?").  We could then prompt users in the greeting to stay on the line for a 2 question survey after the call to leave feedback.  (Are you satisfied? Press 1 for yes 2 for no.  Would you like to leave additional feedback? Press 1 for yes 2 for no.)  I could see this as being a nice compliment to the Talk product!