We were just at WDW. Our dd12 was diagnosed with multiple food allergies (soy, sesame, peanut, some treenut) 30 days before our trip. Brenda Bennett was a godsend
We ate at Marrakesh, Prime Time Cafe, Raglan Road, Liberty Tree Tavern (lunch), Kona, PSLunch, Boma and Crystal Palace (b'fast). The only TS restauant I wasn't pleased with was Raglan Road---our server was not helpful and the chef didn't come out. I was uncomfortable with the server's verbal information----I'd prefer to talk to the chef in person OR read labels. Our dd's major problem is with the soy, which is in everything. The only thing she could eat was the mac and cheese appy and the bangers and mash (and the sausages were GROSS). But all the other restaurants were great, the chefs talked directly to dd12 and made her feel normal again after a really hard month
For counter service, we ate at Cosmic Ray's twice, Pecos Bill, Sunshine Seasons twice, Studio Catering/Flatbread Grill, Tusker House. and the Mexico cs place in Epcot. We had no problems at all with finding the ingredients binder at each location. We deliberately ate on the early side for every meal in case it would take extra time to talk with a manager or chef or if prep would take longer. I knew from Brenda Bennett what would be safe for our daughter to eat the MK locations and that all the wraps/tortillas and regular salad dressings all over WDW would be fine, though of course I double-checked at every location. The chef at Sunshine Seasons was FABULOUS and spent extra time finding a dessert dd could eat (the fruit tulip---she was beyond thrilled

). Cosmic Ray's was also very helpful. We needed the cooked carrots intercepted before they were tossed with the ginger-sesame dressing and both times the manager scooped a container of carrots, walked over to where our food was being prepped (I could see this from the waiting area), held the carrots while watching the progress, then put the carrots onto the tray and carried the tray over to me. So reassuring to this still-freaked-out mom.
Funny/sad story on the way home. We needed to grab something at the airport (flight delayed) so dd12 said "Well, just ask for the ingredients binder and we'll figure it out." I was sorry to inform her that we were back in the real world without ingredients binders at every foodservice location!