You are definitely on the right track, he does set up some custom functions that allow him to swap to a particular style that he knows will process well for the clients, adjusting contrast and sharpness. This guy always has a second shooter with him, on a different angle, in case someone like me stands up and gets in his way. Which doesn't happen very often as his contract calls for him to be the sole shooter and most brides, go to lengths to ensure that happens.

He relies on AWB in the appropriate setting, takes a series of test shots, checks for clipped highlights and sets exposures and adjust ISO a lot more than I thought, continually reviews to make sure he's getting the shots he wants. He also is known for a particular style and brides often request, the jumping shot and so on.

I think quantity of shots plays a big role in the decision.