Hopefully this guy, who knows the specs and has seen, has very different expectations than most of us (and this actually is somewhat possible going by some other things he has said) otherwise it sounds like the answer may be "not very well", he says:
"The marketing mistakes Canon makes repeatedly lately is an understimation of the pace of innovation needed to keep a strong position in the market. The 5D mk II successor, still not announced, will be a disappointment to many."
yikes.
For now I will try to keep the faith though, it just seems to hard to believe they will mess this up even given their recent conservative track record, I don't think they can be THAT out of touch. I hope not.