Does "Speedy Evolution" of PCB Resistance Help Darwinism?

Last week, the New York Times featured an article which reported that "in just 50 years, a fish has evolved a resistance to toxic chemicals polluting its Hudson River home, a new study finds."

The NYT article reports,

Between 1947 and 1976, roughly 1.3 million pounds of polychlorinated biphenyls, or PCBs, were dumped in the Hudson by two General Electric facilities. The Atlantic tomcod, a small bottom-feeding fish, quickly accumulated high levels of the toxic compounds, which caused lethal...