Well over 10 years ago, I was instrumental in setting up a new team at a call centre (UK). The team was to take engineer calls but the call-centre mostly dealt with the public/customers. I remember the manager telling me that for every 7 seconds he could reduce the average call duration, the "savings" would be £50,000 per annum.
Yup - that is the way they work
I used to work on the IT systems for a big call centre
We used to get consultants etc in and they would critisise the main screen we designed as being far far too 'busy'
but changing screen took a few seconds (it was a long time ago) which cost real money
and also impacted customer satisfaction as the call seemed more fluid if the telephone operator had all the information available immediately
call centres are all about reducing call duration
but a good company should be able to do that AND achieve customer satifcation
Oh - and keep 'call waiting' times down to a few seconds - we did it in the 1980s/90s - if we could so it then they can do it now (mutter mutter grump grump - " back in my day" and all that!!!)