[calinet6]

He wasn't using the default settings. When he left everything on fully-automatic, it was all fine.

This is a classic case of someone geeking out over settings and over-optimizing themselves into a corner. Hence the last line of the article, and an excellent moral.

[weiran]

My point was that I'm running a customised set like the one he describes and my speeds are fine, I sometimes even get a 450Mbps link speed.

Saying that, I see no downsides to leaving it fully auto and I think I'll leave it at these settings now.