I wouldn't get too worked up about anything coming from a place called "Strepperweb." On that note, to the original poster: Bro, there is way better shit to spend your time reading.
I doubt the women that actually frequent that forum and take the polls are really anybody to be taken seriously. Aside from the fact that many posters probably dudes, gross chicks that never get laid, and younger people with zero experience, the couple of comments I read were not too informative. Internet forums of that nature are often heavily populated by people that are just lonely are living out some sort of fantasy. And not to degrade the exotic dancing population, but not many of the stippers I've encoutnered seemed to be the type with a lot of time for or inclinations towards participating in an internet forum. At any rate I'd bet a substantial quanitity of cash that less than 1/4 of the women commenting on there are actually female strippers that aren't repulsive looking.
So far as the large number claming to have fucked guys with 9" or more, keep in mind the statistics on that possibility. If only 1 in 200 guys has that size (and it's probably much less, but this makes it easier to calculate), then a woman who has fucked 20 guys only has a 10% of encountering that. Now, I know many of you think that all women are sluts and fuck dozens of men all the time, but that's not really true. A very high degree of promiscuity is considered to be 30 men or more, lifetime, meaning that even the women who are fucking the most men don't even have a 1 in 5 chance of having seen a penis that large.
On the internet people are generally full of shit, so don't take things like this too seriously. I would think plenty of guys would also be encouraged by the number of commenters who basically don't care much and just prefer average, who I also suspect tended to be the actual females posting there. You can be sure that when they say 7" or so, they actually mean 6" or something closer to the true average male size. I think many guys on here would agree that when presented with an actual 7" NBP erection a woman of any experience level is likely to estimate it at a much higher measurement and generally believe anything in the 6" to be 7" or more. Even guys on this forum heavily overestimate size most of the time.