As they mention in the article they anticipated a much slower collapse and likely prepared for that. But at the rate it’s currently going, it’s quite astounding. The fragmentation and internal strife in Russia are certainly not over.
I did read one article that made a reference to this more being an “end of the beginning” rather than the “beginning of the end”. Which I agree with. It hasn’t collapsed the federation overnight, but it’s certainly weakened it a hell of a lot.