Not arguing... just thinking... Wasn't Xenforo released after that announcement though? So, from the beginning of use with XenForo, you'd have to have a developer account?
The article you referenced, and its date:
Xenforo Beta Release and Date
Just pointing out the validity of what Mert was saying, nothing more.
Lawrence is a moderator here, I would imagine he had access to the alpha and early non public betas of XF, which could well have been prior to that June date listed for Facebook requirement.
Some very disrespectful posts in this thread... how disappointing.