If Crocs are considered flip-flops, then YES.
If Crocs are NOT considered flip-flops, then NO.
I'll only go in Crocs from now on. I've never had problems with my feet, however after hearing about the Crocs last year, i decided to buy a pair and try them out. Never had i been so comfortable while in those shoes. I swear by them and i'll never use anything else at the parks.
When i get back to the hotel room i put on my Born sandals which are very comfortable, but not as comfortable as the Crocs.