I did attend National Bartending School and did get a very cool little bag with a cocktail shaker, a recipe book, a jigger, and a strainer in it for my troubles. That's pretty much the only thing I came away with of any real use.
Do you doubt? Go talk to the head bartender at your favorite bar (No, not at TGI Fridays) and see how they got in the business. You'll be hard pressed to find someone who did it via bartending school and if they did, they'll be embarrassed to admit it because they know it was a waste of $500.
Normally, I wouldn't pipe in on something like this, but National Bartending School's response to Darcy was just ridiculous.