I believe in left-hand/right hand tendencies, and started discussing it here not just because I surmise it to be true, but because I've had experience with people who have them. I never said that they were the majority, and I hardly think I was generalizing.
I'm hardly a good english speaker, but by 'scientificalized', did you just mean 'scientific'? And isn't it 'rebutting' with two t's? Just wondering, since we're on the subject of the right way of formulating a rebuttal.
I think the links to researches made that you posted on how a bigger percentage of left handed people tend to be ambidextrous were cool, and I am not one to refute them, having not enough experiences and having not conducted any form of scientific studies on the matter. They also were interesting reads, so thanks for posting them. I do agree on saying more than 'a load of crap', though, and I'd like to hear perhaps a better formulated answer from Morf on this one, so let's give him a chance.