Looking at the source (Twin research unit London, Director: Tim Spector) one knows that these findings state nothing but (however, also not less than) that under the assumption of a stable environment the precentage of variance due to genetic influences is larger than that due to environmental influences.

Two past findings from this group that received more popularity than research usually gets:

- genetics contributes to 60% of the variance in body fat in comparison to diet and exeercise

- laughter is nearly exclusively determined by nurture, that is genetic endowment contributes nearly nothing to what you find amusing or not.

Just a bit of perspective on that recent finding.

Wolfgang