Sorry to the RT apologists having fun, but while I cannot say much, I will say I have had (legal) access to the full, detailed technical specs for a typical modern EU telecom, including all voice and data switching infrastructure (HW & SW). Let's just say there are many mechanisms for tracking supposedly anonymous traffic: think of the internet as sort of like a downtown urban environment with cameras you can replay at will to see what happened where and when. Whereas encryption may mask content (and not always), the routing is there to see, making senders almost as identifiable as receivers (with some diligence) by backtracking to the source ISP. (Beyond that I am guessing there are more things that can be done, but I cannot vouch for them.)
It could still be true that there is amateurism involved in the server hacking accusations, and they may have been made prematurely.
So, it is still wait and see. For now, I don't think the intel is flawed, and rather than for a technical reason, I'll cite another: what it took for Comey's thoroughly Trumpist FBI to come around on the topic must have been
epically convincing. As to the meme of the data release being a public service and no scandal,
the other shoe that has yet to drop is if any compromising information was
also found on GOP servers by the same group(s) and not released, making the entire operation transparently partisan. This may be what has some Republican Senate leaders still pushing for hearings they can control up front. Let's recall: this is the GOP of Abramoff fame and the Bureau of Indian Affairs scandal, and myriad others, including
Reagan's record of 138 administration officials indicted. You know, the same, "honest" good ole boys who just tried to nix all effective oversight of their misdeeds.
As for fake news and echo chambers, political parties are in the business of power, and long ago they gave away the keys to the kingdom by allowing vast media concentration. It started with Reagan, and ended, as did proper financial oversight, during the Clinton administration. Yes, good ole Bill caved in to every major interest he could bend over for.