You dont know that, there is literally no one outside of Blizzard that knows that…
What we know is that the CHEST, will give gear based on rating, thats 100% fine.
The Conquest gear is upgradeable, so if your 2400 and your chest awards a piece already upgraded to 6/6 at 226 ilvl thats fine, as long as rating is not required to upgrade the gear to 6/6.