As you would know, having translated the relevant suttas yourself, the Buddha allowed such claims when certain conditions are met, e.g.
Please do not impose a rule on the community of practitioners that contradicts an allowance by the Buddha. The elders in an early Council, agreed that this should not be done.
addition: and it is in one of the guidelines for choosing what is acceptable and what is not, I believe in the Vinaya. This seems not to have been followed at sometime in the past, as the Pacittiya rule of not saying it even if it is true (against the Buddha’s allowance) was laid down.