I found some odd behavior, I downloaded the latest build from the bleeding edge, and F2 was not working properly.
What happened was that I grab an edge surrounded by faces, then I would hit f to fill it, but nothing happened, then if I exited edit mode, upon re entry to edit mode, a new face was created were it was supposed to be the firs time around I was in edit model, as if F2 needed me to exit and re enter edit mode to create the face.
I was wrong, what happened is that part of the functionality of F2 is part of how Blender works now a days, that is, the capacity to fill a row of empty quads hitting F repeatedly like its shown on the Cg Cookie video I linked, the capacity to create a quad from a vertex however is not, I submitted a bug ticket to the blender bug tracker, as I realized the problem is still present even when I go back to factory settings and I turn on only the F2 addon, at first I thought is was turned on, but that’s just Blender being how it is right now, I guess the devs, added most of what F2 does to blenders native central system by now, except the vertex to quad.
Old rant of the subject:
So I went to the addon folder and deleted the addon completely, and to my surprise, it still works… maybe the devs added the functionally directly in the entrails of blender, so the addon is no longer needed as an addon?, still I found all this to be strange, so can some one else check this? delete the addon from the addon folder, then see if the functionally is still operating? the build Im using is: blender-2.79.0-git.980a864-windows64