Well, our cookies were warm...but as above, it's about 15 minutes. You see the facility while it is closed. In fairness, I don't think the health department would be to thrilled about hundreds of "extra" people walking thru a working kitchen. We saw some of the equipment, some wedding cakes ready to serve, some CM paperwork, etc. Worth doing once, but certainly not a big deal.
On the Magic we needed tickets with staggered times on them--no problem getting them from GS, they just wanted to do smaller groups, so started them in 10 or 15 minute intervals.