Good point. I wonder how useful that is in practice with the amount of traffic going through the Tor network. It seems to me that the more people use it, the ha

Good point. I wonder how useful that is in practice with the amount of traffic going through the Tor network. It seems to me that the more people use it, the harder it would be to get accurate correlations. That said, I wouldn't be surprised if some clever math can do so more accurately than has been published.