Same here. For me the fonts are even completly unique (the "one in x browsers have this value" column is >840'000). Yet I'm using a fairly standard install (I can't remember installing any fonts). Maybe some programs install a font automatically, making you uniquely identifiable quite easily.

But I still wonder how fast the birthday paradox/problem would hit such an identification system. (http://en.wikipedia.org/wiki/Birthday_problem)

I am too, and I have a default installation. How did fonts get so unique?