They came in this weird cup that made it look like there weren't that many but when I counted them there were 28.
They were okay. Straight from a bag in the freezer (I saw the fry cook dumping some in the oil while I was waiting), but with some skin still on them. It was a nice touch for fries that are obviously scarfed down in record time by kids rushing to get to the next ride.
Here are the fries with the PeopleMover in the background.
7 out of 10. Worth getting if you're already at Disney World (but don't buy an $89 admission ticket just to try them).