Apparently Turn 5's actual rating was 1.8%, not 5.2 or 0.9, as some rumors were spreading around. It continues to be bad, but it's better than Turn 4's at least.
Speculation and rumors, yes. Spoilers, no.
The last one on the list isn't a rumor though. It's been confirmed that said character is alive, just missing.
I imagine that, through the power of coincidence, some of those speculations may be real, but at this point it makes little sense to assume so.
I wouldn't count C.C.'s occasional impersonations as a "new" Zero, but that's just me.
Actual spoilers shouldn't confused with rumors though.
Those episode highlights for Turns 6 to 8 are real, not because of that forum, but because there are actual magazine sources for them.