Just thought I'd pop in and say that on modern browser, the sig still pops up instantly, no delay.
...if this isn't happening for you, and you've already tried to clear your cache / force-refresh, let me know what OS, browser, and browser version you're using.
I'd thank you for the info, but there is none; "modern browser" tells me nothing.
On another note, I hashed out a change to the post action buttons (quote, reply, etc). You should see a dark "ghost" of the buttons on posts that aren't being hovered over, and they'll pop into normalcy when hovered over. Lemme know what you think.