ITA with Sammie. In fact, I think that they should make all new MS CMs read the DIS DVC boards for a week, with the instructions: "These are going to be the most complicated customers you will deal with - some will be nice but some will be overbearing, demanding know-it-alls (and some will claim to know the pool temperatures despite the fact that they haven't been here in months) - so get used to it".
And a tip of the DrTomorrow topper to bicker and MyGoofy26 for stating clearly - and with references - a fact that I've tried for years to communicate to DISers, DVC and otherwise.