Why do you always demand evidence of such things? Are you talking about who on this specific thread or are you asking for him to provide you with forum names as to who have "written him off", however you choose to define that.
From my perspective, I've seen plenty of comments from people on here saying that they don't understand why he was signed, is a waste of money, not what we need, not good enough etc.
I think the general point is that it's generally too early to make such comments.