They are probably busy making a list or two! I would say they answer them for say 1hr a week regardless of how many they get (which is fair enough, they are busy guys). I would reckon that your complimentary email would certainly have been duly noted, but at the same time Greg is probably looking at 100's of disgruntled supporter's emails- and trying to keep the wavering customers in the shop.
Fair play to you though- I reckon their would be a mental note made of those that have reasonable commentary, and your comments would be appriciated
(now I'm ready for Greenbergs job)
cheers