From the Pennsylvania State Police Web Site:
Other information included under “Firearm Reciprocity†is a list of states that allow any out of state resident with a valid concealed weapons permit from their home state to carry a weapon while in those respective states. These states usually require the individual to have the actual permit and a photo ID on their person while carrying the weapon. Note that unless Pennsylvania has a reciprocity agreement with a state, regardless of whether or not their home state recognizes our license/permit, the residents of that state MAY NOT carry a firearm while in Pennsylvania unless they have a current and valid Pennsylvania License to Carry or fall under the exceptions as listed in 18 Pa.C.S. § 6106(2)(b).
Emphasis mine. This would indicate that they view only resident licenses as being valid.  This would be an incorrect view. I may try to get some clarification from the State Police themselves. Any law enforcement who holds this view would be gravely in error.