I saw the dolphins on the slide. You do go fast... but if you are on the left slide turn your head to the left, right side to the right and if they are swimming by, you will see them. I had my head pinned down on that 3rd ride and they were right there.
I definitely would not wait over an hour to do that slide...
And on the food: I thought it was great! And this is coming from a vegetarian, picky eater who even has trouble at Disney. I would go back to Aquatica for the beach, that one slide that is like a funnel/toilet, and the food, just for a day to relax (granted, I am recently relocated to Orlando, so it's easy to get people to go places with me when they come to visit...).