As yet there has been no official confirmation from Philip's website but we are working on getting confirmation as to whether it is or it isn't. Obviously, we will let you know either way as soon as we know.
EDIT (24/12/12): It appears these are 'official' accounts but they are being run on Phil's behalf. We're not sure by who at the moment, but there you go. So you can follow them for news about Phil's projects etc but don't expect to be hearing from the man himself.