Different people obviously have different standards for evidence, but I'll just state that for my standard of evidence, at this stage I would assume that Type 09IIIB would feature PMM (hence either hybrid propulsion or IEPS) until I receive new information to the contrary.
That is fine, you are entitled to your perception of what a satisfactory standard of evidence is.
However, as a normal posting member of the forum I will continue to contest the idea that we can speak of 09IIIB as if it has a PMM (either hybrid nuclear propulsion or IEPS).
To be clear -- I am very open to the idea that 09V will feature IEPS, and everything you've described arguably fulfills 09V's likely emergence timetable much more than 09IIIB.
09IIIB has not been spoken of as anything of that sort, and given the newly launched submarine earlier this year is thought to be 09IIIB, I simply in good conscience cannot entertain the idea that at such a late stage of its development/production that we can infer it to have a relatively new and unconventional propulsion arrangement in absence of credible indicators from the usual suspects.