Yes. Comcast throttles Netflix. This is the kind of anticompetitive extortion Comcast engages in when they are allowed to: https://consumerist.com/2014/02/23/netflix-agrees-to-pay-comcast-to-end-slowdown/
From your article:
” Much like Netflix’s ongoing standoff with Verizon FiOS, the drop in speeds wasn’t an issue of the ISP throttling or blocking service to Netflix. Rather, the ISPs were allowing for Netflix traffic to bottleneck at what’s known as “peering ports,” the connection between Netflix’s bandwidth provider and the ISPs.
“As we’ve pointed out before, the issue of peering was not covered by the recently gutted net neutrality rules. Those guidelines only dealt with whether an ISP deliberately blocked/throttled or unfairly prioritized traffic to a website. The congestion at peering ports occurs further upstream and is a matter of capacity.”
Hoisted by your own petard.