Quick question about the end of Fables

A friend who is a huge Fables fan informed me that Willingham has a cap on the number of issues he is going to do. She say it's 140 (citing some column written by Willingham himself in issue 70). I just started reading Fables (a little late to the party, I know) and I was wondering if anyone else had heard about this. All good things must eventually end, but will Fables end with #140?