Eric S, I love your line "that the typical OW student with no previous in-water experience"....yyyyeah...Did you mean that it's typical that some have no in-water experience, or that the typical OW student has none? Either way that certainly fits nowadays. By no previous in-water experience do you mean no swimming or snorkeling, or never set foot in water deeper than waist deep?
All of the above.
I mean people who may know how to swim OK and may have swam as kids, or goofed around or in a body of water, like most kids do.
Then they don't really swim much after that if at all due to lack of pool or whatever. They may swim or "dip" into a lake or ocean on vacation.
These people aren't scared of the water per se but they aren't dedicated water people either. Then they decide to get certified for whatever reason, maybe for an upcoming trip. Some may have some previous snorkeling experience, and some may not.
The difference with somebody who takes up serious freediving, not just laying on top of the water snorkeling, is they learn the dynamics of moving through the water on a dive, they begin to get their muscles in shape and conditioned for the activity, and they learn just by default the "natural" and instinctive way to dive. This is more what I mean by "in-water experience", someone who has made a dedicated effort to breath hold dive and stay under for longer than a few seconds and actually do some skindiving.
So then they take this info with them to their OW class, they already know how to clear a mask, they already know the distortions caused by the face plate, they have calmer nerves, they're more relaxed, etc. The ones that freedive in rougher more challenging conditions for a few years before they get certified really have an advantage. Those are the ones that breeze right through, they already have a heads up on what to expect because they've already been down there.
The ones that have no freediving experience or never had a mask or flippers on ever are taught the conventional way all loaded up with all the regular trappings of modern scuba teaching (gear included) and are planted on the bottom doing skills, and they think this is how diving is supposed to be because they have nothing else to compare it to.