What is the going rate % for agents to charge XXX talent?
 

What is the rate for men and women?

Difficult to answer because most "agents" should not even be called that and are not licensed nor bonded as legitimate "agents". I think that is in many States a person cannot even be called an "agent" unless they also have a law degree.

That is why porn "agents" (using the term loosely as possible) typically charge producers and do not charge a fee or percentage to the models.

pretty much wrong in every regard

I would agree that there are a lot of unlicensed agents making the rounds, but totally disagree in that the biggest and most successful agents are absolutely licensed and bonded (at least in California). You can see a fairly comprehensive list of them here http://latata.org/ and you can also look-up an agent's license here http://www.dir.ca.gov/databases/dlselr/talag.html.

We used to deal with just about every agency, but found that sticking to only licensed agents save us a lot of headache and proved the most responsible and ethical move.

What he said--my experience is the same. Only work with licensed and bonded agents.

What do they usually charge as far as a percentage fee to the model or producer?

HUH???

Ive worked with just about every agent in Fl and Cali and they charge the model 10-20 percent. (with the exception of Mark Lasts) Some agents charge 5 percent extra if they have to provide transportation to the shoot. AND they charge the producer 75-100 bucks per shoot.

Ten percent

In Los Angeles the agents charge the models 10%.

It goes up 15% if they provide the driver and one agency Type 9 just increased that to 17%

Producers are charged $50 if the scene is less than $500 and $100 if it is more than $500 by most agencies, the highest price is $110 by LA Direct Models.

remember when it was $65?

mostly:
no percent to model and 100 to producer if they are little
10% to model and 100 to producer if they are big

Thats correct and some "suitcase pimps" charge 20% or more to the model. All agents pretty much charge roughly $100.