Actually that's not true. It is very much possible to get it in one week if they truly wanted to.
Here's the breakdown:
- Dailies - 2100 XP (300 XP x 7 Days)
- Ancient Reefwalker Bark - 300 XP (100 XP per follower) Weekly
- Naga Deployment Orders - 450 XP (150 XP per follower) Weekly Chests / Mrrl
- Giant Crab Leg - 50 XP per turnin
- Fathom Ray Wing - 50 XP per turnin
- Eel Filet - 50 XP per turn in
- Reefwalker Bark - 60 XP (20 XP per follower)
- Unusually Wise Hermit Crab - 75 XP Mrrl
So if you were to turn in everything at least once you would end up with 3135 needing to grind 1665 unless you get lucky with multiple spawns of the hermit crab in a week. Would it be a bit insane? Yes, but it is still possible and within the realm of people wanting to be able to grind things up in a week to speed up the process (something many here were asking about).