> because timing correlation works great I have read that research. It works great in a controlled environment without the parallel requests of modern browsers

> because timing correlation works great I have read that research. It works great in a controlled environment without the parallel requests of modern browsers, where packages all arrive in order, and where a high rate of false positives are acceptable. Outside of a lab settings the research gets much more muddy and more speculative that it maybe can be used, but I have yet to see an actually experiment that demonstrate it.