Lol I don't remember the numbers xD
'twas a brief look
Maybe I've spent too much time questioning the validity of studies, but I tend to be very hesitant when people start throwing around stats. Your 7k number probably comes from some of Lusche's work, looking at the highest scores of people at the end of each tour. Though I trust his numbers, that doesn't mean you can assume that the highest score equals total number of players.
...Stepping out of the ivory tower...
I agree many of the very to mildly active players on the forum tend to forget they are probably in the minority though.