The positive-to-negative comment ratio in that thread is overwhelmingly in favor of positive. A couple of the top-voted posts are more critical, sure, but once you scroll past those it's full of support and inquisitiveness.
Edit: Even the person who posted the top-ranked comment, with the more negative tone, ended their follow-up response with, "All of your feedback was well-thought-out and appreciated; I only hope that I was able to give you a sneak preview of some of the potential criticisms you may receive. Best of luck to you!".
If we're going to assume that people agree with the post, then we should also be assuming that people agreed with OP's general tone, which really doesn't read as negative criticism so much as constructive criticism. Again, OP's second post was basically, "Appreciate your response to my feedback, best of luck!". Heck, if we're looking at "people who agree based on upvotes alone" then "This is genius, because so many people have this problem," is the second highest-voted comment.
There's constructive criticism (the Dropbox thread) and unconstructive criticism (the Monkey Island thread).
Edit: Even the person who posted the top-ranked comment, with the more negative tone, ended their follow-up response with, "All of your feedback was well-thought-out and appreciated; I only hope that I was able to give you a sneak preview of some of the potential criticisms you may receive. Best of luck to you!".