Really? Ausiello seems to think so, but I have my doubts. I can see how he might think that to be true when he says Carter Bays told him the central mystery of the show is going to be (sort-of) resolved. However, I noticed that Ausiello didn't quote Bays here. Now, what he did quote Bays as saying is:

"At the end of the season, we will address the title of our show," reveals Bays, adding that the last four episodes will feature "big events in the lives of our characters -- specifically Ted (Josh Radnor). We're going to wrap up some things that have been left dangling."