he didnt ride the whole stage for him or anything.
He had a wheel change, and Phil brought him and another BMC dude from the back to the front, dropped him off and peeled off.
peleton was on a fairly narrow road, with about 20 to go .... Phil and Taylor skipped along a side bike path to front.
It was very VERY clear what he was doing - but wasnt as if Phinney was isolated or had no help etc.
Phil also (later) brought Greipel to the front, and there were a whole heap of other OPL guys there to lead him out - and he won the stage - so no actual harm was done.
IMO it was a message to his own management. That he is NOT HAPPY!!!!!