[jeroenhd]

Fast.com loads from nflxvideo.net for me. They have a /speedtest/ path.

Sure, they could apply some kind of advanced DPI assessment based on packets sizes over time and other crap, but if anyone complains it's much easier to just say "well, does speedtest.net work? What about Google's speedtest? Hmm, strange, must be fast.com being slow then!". If they just check for fast.com in the SNI header, I know I'd be loading the speedtest every time I want to watch Netflix.

ECH is slowly coming along, but it's still perfectly possible to detect these speed tests. It just takes much more time and effort to set up right.

I'm honestly surprised the article shows enabling a VPN actually working to fix the messed up network here. That would be a perfectly valid solution in my opinion; if I notice my ISP is messing with my network like this, there's no way I trust them enough not to use a VPN.