I think the list was quite roady-specific. I don’t ever remember as many rules and etiquettes in the mountain biking community. Initially, all the socks jokes on GCN just went past me.
I like his new list, though. I love greeting every cyclist (independently of the bike they ride), and this is something I learnt from mountain biking in Germany. Even when I am on foot, I greet mountain bikers out of habit.