Not really. But those Pisces have something fishy going on.
In an article posted on Psychology Today, scientists have found that there may be correlations between various mental conditions and month of birth. These studies pertain mostly to mental disorders like schizophrenia and bipolarism, but they reveal that individuals born in winter have higher rates of Schizophrenia, in both the north and south hemispheres. Bipolarism is also more common for winter and spring birthdays while Fall and Summer show low instances.
As far as personality traits are concerned, apparently there is no hard science that substantiates the veritability of astrology. Till then, I’m inclined to enjoy it for what it is.