I think the discounts are about an even wash - anybody know? I don't get the cans in FL! :)
The parent swap is a really nice program, and yes, a lot of people do take advantage of it. Not so many that there's an extra "parent's line" or anything weird, but it is definately handy. Just be sure you're ready to go on when your party comes off! The ride ops are really good about trying to get you on within a very few minutes then.
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PO!NT OF VIEW - A Different Look at Roller Coasters
http://www.crosswinds.net/~justmayntz/thrills/