Flipper brings up a very interesting point: where is the video footage?
About half of the riders I pass every day have some kind of GoPro or lipstick camera mounted on their helmets, handlebars, frames, etc. I assume they're using them to document points of interest on their rides, or perhaps they're part of some training system....... I really have no idea. But I do know that the cameras are so small and cheap these days that there's very little financial or aerodynamic cost to strapping one (or in some cases 3-4) on yourself or your bike. Perhaps a more knowledgeable cyclist could chime in and shed some light on this.
This begs the question: With that many team riders and support vehicle(s), wasn't there at least ONE camera in the group? A cursory search of "Tyler Wren" produces plenty of video footage, most of it shot from a support vehicle and at least one showing one of their "Group Rides", complete with riders taking up a whole lane of traffic.
Team Jamis Talks Group Ride
I am not a cyclist and I don't pretend to understand the nuances of these training sessions, but I find it odd that in this day and age, where every Tom, Dick and Harry has a camera strapped to them, that not one of these riders, coaches or support vehicles had a camera rolling.