ANSWER:

There are six F's in the sentence.
One of average intelligence finds three of them.  If you spotted
four, you're above average.  If you got five, you can turn your
nose at most anybody.  If  you caught six, you are a genius.

There is no catch.

Many people forget to count the F in the word "OF."  The human
brain
tends to see them as "V's" instead of  "F's."

So... what'd everyone get ? (don't worry, I wont tell)