I haven't read all the replies but here is my feedback :
1) your thumbs on the movie gals are too small i know you
are trying to emphasis on the fact that its wide screen
HD but the problem is that alot of thumb mgp sites have big
thumbs now so i would do it min size . 320x240
example some big mgp sites with big thumbs :
http://jizzonline.com/
http://www.porngigant.com/
http://www.damnvids.com/
http://www.onlyjizz.com/
They can still be stretched even if you have smaller thumb size
but with that the quality begins to look grainy and pixelated .
2) Another thing about your thumbs on the movie gals are they
are really poor quality like fuzzy / grainy / bad lighting .
I would try to work on getting
large frame grabs 740x480 and shrinking them down and individually
as well with photoshop you can use the sharpening tool and
lighting contrast/brighten to make your thumbs look better .
(this is only if you don't have the matching photoset to replace them,
otherwise if you do of course use those) .
This will drastically give you alot more click ratios
on thumb sites cause the thumbs will become alot more appealing to
click on .
3) If you have "Bonus Sites" Offering your members All Access
Network . On the bottom of the gallery ,
Put screenshots of the paysite design or else the logo's
of all your sites that the membership will get
access to as well . This will triple your conversions
Cheers