Oh in case you saw this being shared
#Telegram quietly updates FAQ, removing:
"All Telegram chats and group chats are private amongst their participants. We do not process any requests related to them."
But They lines now appear in response to a question about *copyright*, not illegal content.
Whether or not the actual rules have changed is unclear. These aren't the definitive rules, they're an telegram FAQ page.: this is at least a big change of emphasis though.