I probably started trying to get ahold of all the restaurants about a week before. This was when they actually gave you the # to the restaurant. Now, if the restaurant is in a park, you get a central #. Like all the MK restaurants are at one # and all the Epcot at one #, etc. You don't actually get to talk to the chef. I think this is good cause of less phone calls but bad in that sometimes my requests did not seem to make it.
I think you will have to follow-up with the person you get. If you get Brenda Bennet herself on the phone - she is great. She always passed along the info and got the chefs to call me back if I needed it. I sometimes had specific questions - I would look at the menus of the restaurants ahead of time and ask if this or that was safe, etc. Or make my requests through her.
Crystal Palace has always been great. Boma is THE BEST but ONLY if you can get Chef TJ - he is da bomb. He is the best chef on the property if you have food issues. I would eat at Boma every night if I could get him.

We might actually stay there next time if he is still there just to get him. Other good places have been Le Cellier, Rose and Crown, Mama Melrose, Biergarten (we always go there), and the French restaurant.
We have faired better more recently with desserts but not always. Sometimes we arrange with him in advance something he really wants that is safe - like something from the ice cream carts (mickey bar, itskadoozie).
The Mickey waffles, in our experience, are safe - so that is weird that gave gluten free ones! I am guessing that the gluten free bread would not appeal. At the diabetes conferences we attend they have a special section of the buffet that is gluten free (because there is a higher incidence of celiac among type 1 kids/adults). That stuff happens to be peanut free so we are allowed to take from it, but the breads I've tried were never that good to my taste - nor did my son like them. The desserts were better - cookies and the like. That reminds me of them giving my son tofutti - they knew it was nut safe but because it wasn't made with dairy he did not like it -was not used to it.