XF 1.5 Facebook 'like' function

How does the 'like' function supposed to work? What should I expect to see/happen when someone presses the 'like' button on my website? What should the user expect to see/experience? These are my settings:


That's what I expected to see but I had 2 test people click on the Like button on my website and I don't see the link on their FB wall. Why? Is this instant or is there a delay of some sort?