Sorry, I don't agree. "Off the record" is a term that is obviously and simply applicable to an IM context. It's the fault of the people who made an app called Off The Record that someone else has used the same term.
The simple and obvious meaning is encryption with PFS, right? It's not as though you can prevent the person you're speaking to from logging, and given that he or she could be using an XMPP client not written by Google, neither can anyone else. The "Disable logging on my end" feature should probably just be called "Disable logging on my end."
