20% of online players win, why do so many say only 10% do???

[Rubber Soul]

I am curious as to why so many people have been saying that only 10% of all players win (online). I have seen several published reports from poker tracker stats that state about 20% of all online players are winners... Now, there may be only 5% who win big, but I think 20% is the actual number of those who win... Some reporter at ESPN claimed he talked to poker site operators off the record at the WSOP and they said only 7% win... That just doesn't sound right...