Off-topic: I've noticed in the past few years that many call center workers have a new, distinct sort of accent and cadence. I don't think this is just a chang

Off-topic: I've noticed in the past few years that many call center workers have a new, distinct sort of accent and cadence. I don't think this is just a change in the language demographics of the workers because (1) I can still usually distinguish Indian speakers, although I could be wrong, and (2) it's really a different shared cadence rather than just different sounds. Has there been any systematic change in how the language training for call center workers is done?