There was definitely a group of friends and supporters of the front pack of pros following them on bikes during the entire course. A friend of mine who was photographing the race says he heard Gambles telling Ben, "Let them surge, Ben, just sit back and..." while Callum was surging.
Here are some photos (photos by Kenny Withrow):
How is this not a pacing violation? Not just on Joe's part but on the part of all the people riding with the racers, other than the lead biker and officials?