I'll be honest, I've stopped responding to every bit of feedback and sometimes I don't see them right away, but I DO read them all.
Somethings I've heard before, a lot. Somethings I've already fixed. Somethings I've answered the question two posts before. Sometimes I read it as I'm running out the door 5 mins late to my real job
What I need is a service like WowGuru had, even though I don't use there site anymore, that would notify me via email if someone makes a comment. Do we have that Cair?
Sometimes I won't see a post for weeks or longer because I can only focus on so many mods with the time I have and after long periods of no reponses I may not check it everyday, which normally means that as soon as I stop someone responds and then I don't see it.
So even if its not answered or it seems like its ignored its still a good idea to give feedback. It also gives other users the ability to see what people think of the mod, not just the mod author.