I think we need more data than that before we draw any conclusions. That&#x27;s a rather small sample size.<p>This reminds me of an excerpt from The Sports Gene about Met and Val alleles in the COMT[1] gene, though:<p>&quot;Cognitive testing and brain imaging studies have found that subjects with two Met versions - both animals and humans - tend to do better and require less metabolic effort for cognitive and memory tasks, but that they are also more prone to anxiety and more sensitive to pain. Conversely, Val&#x2F;Val carriers seem to do slightly worse on cognitive tests that require rapid mental flexibility, but may be more resilient to stress and pain.&quot;<p>[1]: <a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;22530780" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;22530780</a>