I find it interesting that everyone who gets it right qualifies their announcement. “I got six, but I’ve seen it before, I’m a copy editor, etc.” You’re all so modest!
Not me: I’ll just come out and say it. I counted six F’s by reading it from beginning to end and counting the F’s.
I got all six after just going through once. Never seen this before. Of course, I simply ignored the meaning of the words, and simply scanned the letters.
I gt four the first time, (picked up the last of) and then missed the last two for another few read throughs.
It’s nice in the middle of the room - they have the best punch, and there’s still sugary biscuts left…
Grrr. So did I. I looked twice and only found 2 of’s.
I got 6 - I am a freak for puzzles like this.
I am also very easily distracted by spelling mistakes in signs, newspapers, posters, etc.
I should’ve been an editor or proofreader or something …
S.
I got all six, but I work with contracts where every F’in word counts. 
I’ve had the email pertaining to this, and it took me half an hour to decipher it, my brain apparently doesn’t work "that " way (or course I type like that all the time)
Oh and I said 4, I knew it wasn’t 3 (seen that test before), but I didn’t count all the ofs
I got all six, but only because I noticed the of on the last line and recounted.