I just posted a question on http://electronics.stackexchange.com and kept checking both the inbox and the comments section to see if there were any queries.
Nothing happened for 40 minutes (not even a box saying load more comments) but when I clicked F5 a couple of comments appeared (and messages in the inbox) plus an answer that had been posted 35 minutes earlier.
I am using an up to date Firefox 24.0 and the web page was in the currently selected tab and I occasionally moved the mouse pointer if the screen saver kicked in.
So my question is: when does the question check for updates, and is there anything I can do to make comments/answers automatically appear (or do I just need to keepy hitting refresh)?