This parasite is indeed real and widespread, and the reason you don't notice its effects in others is because its effects are rather minor, resulting from small brain infections and increased dopamine at certain sites (I had no luck pinpointing the location of these, unfortunately).

The most agreed-upon effect appears to be that the parasite results in decreased neophilia. What a sensationalist story like this one will not tell you is that the observed effects are "rather low":

Our results showed that CMV infected subjects had lower scores in the personality dimension novelty seeking than the CMV-free subjects. Novelty seeking in infected subjects negatively correlated with levels of anti-CMV antibodies. Negative correlation was also found between novelty seeking and Toxoplasma-infection in Prague, while in villages and smaller cities the correlation was not significant. The effect of both infections, although highly significant, was rather low, explaining about 2 % of total variability of the novelty seeking in our experimental set.

http://www.biomedcentral.com/1471-2334/5/54

Further, while cats are this parasite's original host, it seems that you're as likely to become infected form undercooked meat as from water polluted with cat fecal matter. I guess that's not as much fun as saying "cats are bad, now everyone fight!" I love how every media outlet picked this up as soon ('06, granted) as possible but it took Reuters a month to report on conclusive findings that marijuana consumption results in lower incidence of head and neck cancer.