Referring to the new feature here:
I'm really not happy about this. For starters, it came as a surprise (the original idea was posted in the middle of the night my time, so it was buried by the time I checked the site the next day). But the main concern is that voting to close used to be anonymous.
If the voting to close was successful, then your name would be published, but ONLY once you had the backing of either a) 4 peers or b) a moderator.
With this new method, if I vote to close as a duplicate and nobody else agrees with me, everyone will know. With the old method, if nobody agreed with me, then nobody was any the wiser, and we all went merrily on our way. Nobody got hurt, everyone wins.
It's an invitation for people to start arguing over the close vote reason in the comments, when there's normally no need for arguing until you at least know that 4 other people (or a mod) agree with you.
I for one will probably be no longer voting to close as duplicate, as I don't want my name published unless I have the backing that a successful close would bring with it.
(and if you're going to auto-post under my name, you better get it right).