I've been told that drinking it via a straw is better on your teeth because the straw deposits it directly into your throat and doesn't swish it around your teeth, but in any case I suspect doctors and dentists have stopped telling people to change their diets because people just don't.

It would be hilarious if this turns out to be true. My wife eats slowly, has some dental problems. I eat extremely fast, have been criticized my whole childhood because of how fast I eat (and drink, but nowdays I drink only water).

I have zero dental problems.