A turret press helps only with die set up - you do it once and then they stay in place ready to be used at any moment.

Otherwise a turret press is like a single stage, you pull the handle once for each operation: resize, expand, seat, crimp and of course you add powder.

A progressive press does all those operations with one pull of the handle, that is where it's speed comes from.

To recap: a turret press saves time only in die set up, it does not make the actual reloading process any faster.