the ladies I have seen twice or more above that range are generally very pretty and very fit. few turned out to be a bit older than I expected. sometimes a drop dead pretty girl is still pretty even when she is a little bit older. other times she is just ugggh.

when you want a popular / expensive girl
such as a well known porn star you have to do some  home work and make sure she isn't too old. otherwise you are just posting for her celebrity status rather than good looks and quality.

in terms of performance, there is little correlation if you ask me. just stick to well reviewed girls and you will be fine.