Back in the day, like, way back, some anon's did show there were "purposeful" posts logged at certain time's, down to the seconds, that seemed to be one of those "not-Q" drops.
I can't recall how they managed to figure out the indicators etc. to even start looking but they did show their reasoning/work and I found it valid. This place was a very different beast back in the day: even Q team treated it differently.
I wish I could point you to the research done on it, but trust, you're on the right path there.
Cannot believe I forgot about that until you posted this. The original findings coincided with a shift in this place. Kudos.