Delay to what date? They can't delay it for a month, so they would have to delay it for either just 1-2 weeks which is pointless or to early next year which would be problematic. As much as I dislike the rushed release, it's pretty safe to assume the release date is correct.
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This. The release feels a lot like the delayed Shadowlands launch, which is not good in my opinion. No idea why they are in such a hurry for Dragonflight.