Dave is connected but doesn't reveal his sources typically. When sources tell him 'you cannot repeat this' he has become much better at not saying anything. I would surmise that one of his sources might be Doug Haw I think his name is, who has been on the show and has some sort of friendship/coaching relationship with Brian and the TCC.
I did see on twitter that an obscure junior US skater posted that he has many contacts at Raf's rink and that Raf typically doesn't take any skater on unless they visit, try out, discuss the skating etc. He was adamant in posting that Gogolev has not been to Raf's rink so he's not buying that coaching change has happened.
Having said that, if Lee is in fact leaving, I would imagine this opens the door for several skaters to re-evaluate their coaching situation.
Some interesting shakeups likely this summer with the news of Lee and Bruno/Meg. Popping the corn as we speak. I'm here for it.