Just added you Gav, have fun hunting.
And on this particular noteI don't believe that's accurate because I was talking to DL the other day about the Friend Safaris and he had mentioned that he had found Poison-type Pokemon for my area on his game. I do believe that it is different for each and every person and the friends that they add. Maybe get a confirmation with someone else who hunts in a Friend Safari for Gavin's area and see if he/she also manages to find Fire Pokemon or something different.