Let's remember that this was the first time he used the ATM, it would appear that future interaction would only take the time to send the BTC to the robocoin wallet and wait for the confirmation (~10 min for the required 1 confirmation). 10 minutes is pretty quick IMO to convert BTC to cash, the only faster method would be using Local Bitcoins (which are the people running the ATM in this post) but that assumes you could organize, agree on a price, and meet up with another person in less than 10 minutes which I know from experience is pipe dream.