You say he is wrong with his generalizations then you make some of your own.
The reason why the 'farm raiding' is so fast is because of the massive loads of hours they spent already learning, gearing and preparing for all of the fights.
All you need to do is look at the time/dates when these world first guilds are recording their kills. World first guilds are doing them during the day on the day of release, when '9 to 5'ers' are at work.
Most 'hardcore' guilds are 12-20+ a week now. It is about dedication and choosing how much time you want to put in the game. I for one, am more than happy at a slower pace but at a casual 9 hours / week. There are other guilds out there that do it better, but I have fun with my time.--
I know you are the only one
A little taste of heaven
You know I am The only one
Your bitter taste of hell