Since this is the basic scuba forum, I'll give my opinion for posterity.
For descents, there's two ways. One: it doesn't matter and Two: it matters.
First and foremost. You should be ready to dive. You should not be rolling over the gunwale if there's any doubt. Be ready to go.
Now, most charters, especially those that anchor are going to herd everyone down a line. They'll expect you to signal that your okay once you splash, yadi ya. We seemed to have missed the part about being ready to go (this includes knowing your gear is good and setup/installed properly). For this type of diving, whatever, the descent is trivial.
But for deep water or high current diving and trying to get on to a specific reef or wreck, you need to get to the bottom quick. A good captain is going to position you up current. There's no screwing around on the surface as depicted. You should be, negative, head down and equalizing immediately and often.