I find it far-fetched to believe that a group with the drive to down T7 Savage would not be aware of the progression thread and post in it, or at the very least, make it well known on the server that they've cleared it. Savage provides no rewards aside from a title. The only reason to do it is for the challenge of beating one of the toughest fights in the game. When someone goes through the type of effort required to down a Savage turn, they probably want some kind of recognition of it. It's not necessarily wanting attention, but just recognition of the hard work and talent put into achieving that goal.

Think of like, that tightrope walker dude who does it over stupid things like the Grand Canyon or the Chicago River. Do you really think he'd do any of that if there weren't TV screens everywhere? No. He's not going to do something that difficult if no one is going to recognize that. That doesn't make him an attention whore, it makes him human. People generally want recognition for their accomplishments. So the type of person to put the effort into downing any of Savage is the type of person who understands what that accomplishment is, has a relatively good idea of progression on the server, and would most likely have posted about it or made it well known throughout the server.