Yes, surely it's a coincidence that two of the most powerful statically typed languages have the least defects.
>One should take care not to overestimate the impact of language on defects. While the observed relationships are statistically significant, the effects are quite small. Analysis of deviance reveals that language accounts for less than 1% of the total explained deviance.
Nor do these most powerful statically typed languages appear to perform any better than dynamically typed Clojure and Erlang.