I have seen terms like 24/7 and TPE used interchangeably like submissive and slave. it is a bit confusing. I think that what is most important is the precise communication of what these terms mean within YOUR D/s relationship.

I see the ability to communicate openly, honestly any expectations and needs within your relationship with your Dom as being more important than what the "others" in the BDSM world think.

I truly believe that each D/s realtionship has it's own, unique look and connection to it. Like a fingerprint. No two are exactly alike because the people and the needs within each relationship are a little different.