My problem with what he said in that thread is…
This is a 100% false statement. If some, most, or all of the other traffic on the road is trying to go faster than you are, you are by definition impeding traffic. It’s irrelevant what the speed limit is and how fast you are going and how fast the other traffic wants to go.
This is also a false statement. Going faster or slower than the flow of traffic is more dangerous than speeding. So if everyone on the road is speeding, than not speeding is more dangerous.