I've noticed quick reply is not working consistently, especially the light editing options for quick reply not always showing up (like right now, I don't have any kind of tool/editing bar above the text box). Top 10 still loads extremely slowly or not at all. I wonder if that's the starting point of these issues?
I did seem to have the same issue as Felipe, though, with replies. More often than not, quick reply has been sending me to the full editor.
EDIT: Well, now after I post this, both seem to be working fine now on my laptop at home What the hell...