The article does not say that TOR was broken, nor that TOR is "not anonymous anymore," nor that it has been "cracked by the FBI," nor that x% of nodes are controlled by the US federal government. What it does say, in addition to that there is "no reason to panic," is that nothing is perfectly secure (i.e., vulnerabilities are expected), that the Feds may have simply piggy-backed onto CERT research that was irresponsibly done in a live environment instead of in a lab, and (via a linked document) that the actual number of real sites (as opposed to scam/clone sites trying to fool people seeking the real ones) taken down in Operation Onymous was far lower than originally claimed. The CERT research in question apparently was oriented around the already-known "traffic confirmation" model of attack, and this instance was ostensibly stopped when the CERT nodes were given the boot and vulnerabilities that enabled the attack were patched.

As for the use of public WiFi, if (theoretically) I'm using TOR via Tails on non-writable optical disc in a laptop while I sit outside a retail store with a generous WiFi presence, what are the real odds that my anonymity for that session will be broken after I power down (assuming no ridiculous behavior such as posting something in public that literally announces who and where I am)? I've never even tried this, but the idea of securing a truly anonymous connection is intriguing. I suppose that should just be a hypothetical question since this thread is about Ross Ulbricht (and OJ Simpson???) and not my curiosity.