sure it's likely that the 25% that don't agree with will fall into line, but can we really call 75% a successful agreement
lets all vote 90%
I don't think we can call 75% consensus. That's more like 50% or so + a lucky streak. I believe consensus is basically paramount to virtually all other concerns in regard to the protocol. And that certainly includes a contentious debate about block size.
I concur -- 90%.