Not photoshopped, it's the Mirror getting overexcited again.
http://www.digitalspy.co.uk/tv/s7/do...mpaign=twitter
However, BBC Head of Communications Sam Hodges swiftly took to Twitter to play down the "over excitable headline", posting: "#DoctorWho fans - Matt Smith hasn't quit. See him in Asylum of the Daleks, tomorrow at 7.20 on #BBC1."