I tried scheduling a breakfast at a table service in our resort (Poly)before our KTTK tour in Dec 2005. The restaurant was running late that day and we ended up skipping breakfast to get to MK on time.
I was at CRT for an 8 AM reservation for my DDs b-day in January. It took quite a while to get in and seated, let alone eat. It wasn't until well after 9:30 that we were finished.
It might be better to try a TS breakfast on a day when you've got more time and just grab a CS breakfast the morning of your tour.
Enjoy the tour, it is great!