Speaking of snobbery: the reason why "Indian food is so delicious" is that beauty lies in the eye of the beholder. Or, more appropriately: "de gustibus non est disputandum". I know lots of people who really don't like Indian food. (luckily, I'm not one of them).
Perhaps something that the cited studies overlooked: surely, one reason a lot of Indian dishes are tasty is their high calorie content. Hmmm, sweet calories.
For instance, check out Vah Reh Vah chef's recipe for Dal Makhani [1]: the amount of oil, butter and cream combined in a single pot might well clog your arteries just by watching the video. ;-). Yet, I'll be damned if I didn't want to try it right away!