Yep; maybe they did lots and lots of testing that showed that these questions were reliable indicators, but I for one don't see how these can fit all the different circumstances, including, for one: how hungry you are. If you're ravenous, then yes, everything on the menu is going to seem delicious! Also, if you're ravenous, you're probably going to be wolfing down the first bites, probably without stopping to enjoy the taste all that much.