The very first sentence irks me: "[…] for the only standardized chat protocol [XMPP]" Haven't they heard about IRC (RFCs 1459, 2810–2813)?
OK, my bad: The oldest RFC is just "experimental" while the newer ones are "informational", and explicitly stating "It does not specify an Internet standard of any kind."
[0] http://en.wikipedia.org/wiki/IRCd#/media/File:IRCd_software_...