Playground's conformance with spec?

Dear All,

Super quick question:  Are JSON-LD samples - expanded, compacted, and 
flattened - in the JSON-LD Playground [1] in conformance with the final 
spec [2]?

I think the answer is yes, but I've never been clear if the Playground 
was modified as the spec evolved and whether I could fully trust that 
the JSONLD output matches the final spec.  A note on the page says the 
spec is still in progress, but, of course, it isn't.  The note could 
suggest that perhaps little attention has been given to the page and 
therefore what is seen in the Playground may be out of step with the 
spec, hence the question.

Cordially,
Kevin

[1] http://json-ld.org/playground/index.html
[2] http://www.w3.org/TR/json-ld/