I too have received replies from AC whenever I wrote them. 2 letters so far this year (1 compliment and 1 complaint) and I got a reply for both letters within a month.
I'llMissCP: All of us here admit that AC are improving in terms of responding to complaints (whether it's form letter and personal response), if you have a problem, write to them (I don't care whehter you work with latest tech, I bet you are just too lazy, what's the difference between email and typing up a letter to send it in? A stupid stamp cost you $0.50, yes, we know that AC is not as high tech as we would like them to be, but if you are Elite, you have an exclusive email to use and most Elites here will tell you that they do get a response).
Until you actually do something, i would say stop complaining and don't make it sound like AC owe you something on every single one of your trips. (Although AC is not exactly my best friend, i couldn't stand the way you complaint over the last couple of days and especially the way you are wording it)!