Having the 5th best record over a decade and making 5 Conference Championships isn't any indication?
If we were having this discussion in 2005, I would agree.
However, since that time this team has been mediocre more times than not. The only real playoff run they had during that time, in '08, only happened because there were a mind boggling string of unlikely scenarios that went in the Eagles favor just to get into the playoffs at 9-6-1. From 09 until now this team has gotten progressively worse.
So since you are asking me this question in 2012, no, he hasn't given me any indication that he could take this team to a Super Bowl. His philosophy doesn't fit the strengths of this team offensively, and Vick isn't good enough to compensate for that like McNabb did from 2000-2004.