Well, I’ve been guessing 6 days, so I’m not going to bet against.
Remember, folks: dungeon grinding is known to be substantially more efficient than solo leveling. Organized dungeon grinding by what is essentially a professional gaming organization is going to be VERY efficient. Possibly as little as 3 days of /played to get to level 60. And that doesn’t even mention other players in the guild who spend their time farming gold and various mats to make things faster for the core raid.
Even if such a professional gaming organization spent 16 hours a day grinding, it’ll only require 4.5 days to get to level 60 (or 6 days if it takes them 4 days of /played). At that point, everyone has dungeon gear. A few more runs for attunement and some gear upgrades, and you can zone 40 people into MC.
We’ll see if it’s possible in two weeks.