There is A LOT of misinformation about the Cinderella Royal Table breakfast and this has caused confusion for many guests over the years. I know of the trials and tribulations that parents encounter with this attraction because I have several daughters and they ALL wanted to see Cindy over a period of years. I am here to report that all of my daughters have been to Cindy's Royal Table breakfast on many occasions. Never once did I call 90 days in advance for the Priority Seating. It's not needed and here's why.
Back in the good old days Priority Seating was only available to Disney Resort guests. You could either make your PS requests at the time you made your resort reservation or you could just hit the "Disney Dining" button on your resort phone to request your PS. Making PS arrangements was easy. However, then class envy caused a problem. Non-Disney Resort guests felt as if they were second class citizens and thought that the Mouse was discriminating against them. They wanted access to PS as well. So, WDW in its wisdom made PS available to the masses! Anyone could call and get PS and the PS's were transferable. Once a PS was made in your name, you could give it to anyone! That created a whole new problem.
Cindy's Royal Table Breakfast is THE most popular PS meal in WDW. Shortly after the PS deal was opened to the general public a rather crafty person began to call and get multiple PS's. He (or she) enlisted a rather large group of other folks to help. Best I remember, they called themselves "Bernie's Angels" (or something like that). These folks would call the 407-WDW-DINE number from all over the world to get PS's at Cindy's and then they would turn them over to Bernie for distribution on his website. I won't go into the "money" side of the deal because that's a whole other story. So, once WDW received enough complaints about this scam artist they started a new policy for PS at Cindy's.
As of June 09, 2002 Cinderella's Royal Table Character Breakfast requires a credit card at time of booking. A deposit of $10 per adult and $5 per child is charged. The lead name on the Priority Seating may not be changed and no names may be transferred to the reservation once it is booked. In the event you need to cancel, it must be done at least 24-hours before your Priority Seating to avoid losing your deposit and have your credit card credited. Otherwise, you WILL be charged the deposit! To cancel you must call 407-WDW-DINE. Be sure to have your Priority Seating number in hand to give to the Cast Member.
Many people seem to think that Priority Seating (PS) is the same as an advance reservation. It is not. Priority Seating is not a guarantee that your party will get a table. Your PS number really only does 2 things. When you arrive at the MK you have to go to the far left set of turnstiles to have your name and number checked for PS at Cindy's. You get in line with everyone else and you DON'T get into the MK any earlier than any other guests. When you get to the venue your PS normally gives you a 15 to 20 minute "advantage" in that if others are waiting that don't have PS then you will go ahead of them depending upon the size of your party and the tables available. For example if you have a party of 2 or a party of 9, then you may have to wait a long time! But if you have a party of 4, 5 or 6 then you'll most likely get in first.
Also, to put this all in perspective, recognize that certain guests always get better PS's than others. If you get a PS through WDW concierge service then you are pretty close to the top of the list. In reality the party at the top of the list (with or without a PS) is the person who discreetly gives a $20 bill to the CM and asks, "Would you help us to get a table please?". Money talks and PS walks.