Has anyone done a comprehensive study of piano virtuosi through history and confirmed that they nearly all have those hand proportions, to a much greater degree than the rest of the population?
I'd be interested to see that.
Such a study would be quite difficult because of many things. And it's not relevant to this discussion really. I never said there was only ONE optimal make up for being a virtuose player. You must have misunderstood me. There must be countless of variations that work well, just as there must be countless of variations that work less well.
Do you think? Actually considering how long its been since they completed sequencing the human genome, I find it surprising how LITTLE light has been shed on most of these factors, and how little confirmation has been found for most of the folk wisdom that so many people assume about genetics.
I think you would need to learn a bit more about genetics. Even if we have sequenced the genome we still know very little about human genetics. The research is in no way simple, easy or cheap. There's plenty going on all the time, but the development of knowledge base is slow and gradual, as it normally is in science. I am not basing anything on folk wisdom, only on what I have learned about genetics both in theory and practice. I have been fortunate to be able to interact with some expert genetists and that has greatly helped me to understand this fascinating field a bit better.
At any rate, even if what you say is true, that's not a reason to just assume that something must have genetic causes, because some other things do. Undoubtedly as more gets known, they will find and confirm things that genes contribute to. But those things are still specific. That fact that your genes influence your height doesn't mean they must influence your propensity for schizophrenia as well. And if it DOES get proven that they influence your propensity for schizophrenia, that will still say nothing about whether they influence your capacity for musical excellence. Really, the only thing that will provide a case for that is evidence of that, specifically.
I can't say it isn't true, of course. But we have no evidence that it is.
There' plenty of evidence around about how important the genetic base is for development, if you care to look for it. Most people do not understand genetics at all. It's not about having a gene for everything. The genes interact with each other and the environment in a way that makes the system extremely complex. That's why it's so difficult to make predictions about the final outcome based only on genes. We also cannot necessarily say WHY exactly someone has a more suitable machine for a specific activity, but it's still quite clear that some do.
This does not mean that I think it is a good thing to select heavily or early, because it can always go wrong. It only means that we should allow the differences affect the way we teach to get the best outcome instead of denying they even exist. And because we do know that we are a result from the interactuon of our genes with the environment, it is safe to say that genes dictate some part of learning to play.