Well, one things for sure.. those pics have been used by dozens of different ads over many months.  I doubt that girl is even a working girl.  Someone just found some nice pics, and everyone copies them.  I'd say the chances of you actually getting to see that girl by calling the number in the ad are about zero.  

There might be a different 'nice brunette' waiting, but maybe not.  Basically, if I am convinced the ad or the provider is being blatantly dishonest, I will not see them regardless (even if the real girl is hot).  They shouldn't be posting fake pics/information.  Please do not TOFTT in this case my brother.  Avoid bogus providers/bogus ads/bogus pics.  Others should be along shortly to back me up on this.