The AI took too long to answer, so calls felt robotic
On a phone call, a pause longer than about a second feels wrong. People start talking over the assistant, repeat themselves, or hang up. Replies were taking 1.7 seconds on average and nobody could say which part of the call was actually slow.
We broke 200 real calls down step by step and timed every stage. Turning speech into text was eating two thirds of the wait, and the timer we had been trusting was reporting numbers that were physically impossible. So we fixed the measurement first, then tested six speech providers side by side on real audio, moved to the fastest one, and put every service in the same part of the world as the phone line.
The provider we moved to measures 0.7 seconds against 2.0 and 3.7 for the two we retired.