Conversion Ratios Compared To Marketing Technique?

Just wondered if anyone had an 'average' conversion ratio percentage based on the different types of marketing available to webmasters in the adult industy?

What i mean is, for TGPs, it is generally considered that 1-3% of clicks on the gallery end up at the sponsors tour page so, does anyone have those types of figures for other types of traffic?

For instance...

Mailings, SE, Pic Posts, Link Lists etc etc?

Anyone know if there are even figures like that available?

Regards,

Lee