For Pizza Really???

So, I've been staying home with an ugly case of the hives (yes, yes...they itch like crazy even with five gallons of cream). I decided to order pizza and Papa Johns is the easiest for me because I can order online (no annoying phone order mishaps). All went well and the pizza was good, but during the evening I received a phone call on my "cell" of all things from Papa Johns wanting me to take a "quick" survey. Since I'm not talking to a computer (it's a real person), I feel some unknown obligation to answer the questions. So, on a scale of 1 to 10 how was my pizza? Can I really quantify my pizza experience like this? The pizza was good, just like any other pizza, and I enjoyed it, but does that mean I need to give it a ten? Now I'm stuck in the middle of an ethical dilemma...do I dash the surveyor's aspirations of excellence by giving a seven because it's just a pizza?? I just cannot ruin his evening with lower than a ten...I mean come on...it's just a pizza. This whole thing of course takes the notion of how we answer surveys to a new level. How are answers skewed when there is a real person on the other end?