NMReb: I dont know why anyone is so shocked that Euwe's % is better than Botvinnik's , their record was 50% with one another.
Because Botvinnik is widely regarded as one of the greatest players who ever lived and Euwe, is not, that's why. And if you're having trouble remembering why that is --
Here's a link to the Wiki on the 1948 World Championship, I think it partly (but only partly) explains my "shock" at anyone placing Euwe above (or for that matter equal to) Botvinnik.
http://en.wikipedia.org/wiki/World_Chess_Championship_1948
Reb, your reasoning is plagued by drawing global conclusions from small sample groups... "Botvinnik vs Euwe: the equality" this is only possible in your vacuum dreamworld of 4 decisive game against each other, with Botvinnik's losses coming when he was at the very beginning of his international career. If we use your bizarr-O reasoning, we have to admit Geller's undeniable superiority to Fischer.
This seems like a good time to bump my Karpov vs. Fischer thread... which attacks your "so and so beat so and so therefore so and so is obviously better" methodology.
Botvinnik used his "position" in chess to hurt any possible challengers, Bronstein and Keres come to mind but I am sure there were others. He also did NOT want to play a match against Euwe after the death of Alekhine and again used his position to bring about the tournament that was held to find a new world champion after Alekhine's death. Read Kasparov's books on his great predecessors, he mentions all these things. Kasparov also mentions the "cheating" that Fischer accused the USSR federation of and defends those who cheated by saying they had no choice but to do as ordered or else they wouldnt get to go next time.

Reb, I have no hatred for Fischer the chess player. I do have a keen eye for bogus logic. Fischer may well be the greatest chess talent that ever lived, he may well be the most accomplished chess player that ever lived. But none of that is indicated by the win percentage that you quote in your first post.
In your most recent post you're arguing against things no one ever stated. No one ever claimed Kasparov would win a US Closed Championship with a perfect score. No one ever said the players he faced in candidates matches were weak players. Fischer's win percentage is only 3 percent higher than Kasparov's. So only 3 percent of his games have to be against weaker competition to account for that difference.