Depends on whom I'm talking to. If I am close friends with the person/s then it can take a while. I've had more than one moment where me and my mate have agreed we're calling it for the night on the xbox and yet sat there for another 2 - 3 hours in the game doing smurf all whilst talking over things. This in Destiny has led to some interesting moments where we're in the tower or reef trying to do stupid trout.

If I'm on the phone to my family it's generally pretty quick at getting off the phone usually "ok, well ttyl bye!" stuff.

Work calls kinda depend on the person I'm talking to usually "That's great, thanks!" and I'm done though.