Not yet. He hasn't played long enough. Talent wise he definitely has it over Kelly. He will probably have every Bills passing record when its all said and done. If he leads the Bills to a Super Bowl championship ( I think he will) then he definitely replaces Kelly as the greatest QB in Bills history. Before Allen became a Bill I would list the top 3 QB's in Bills history as Kelly, Kemp, and Ferguson. Josh has already passed Ferguson but he is still behind Kemp ( 2 AFL championships) and Kelly ( 4 Super Bowl appearances)