Not sure I agree. Yes, you can sometimes try a "new" girl and have an awful experience, but I guess I've been lucky in hitting girls I connect with.
There are plenty of safe ladies that have been around for ages, and in the right circumstances, they suffice. But I have to admit I've been lucky lately and found a number of ladies in Do Not Discuss spa's that I have built a great relationship with, and who make it very, very hard to decide who to see each week. Each has their own special attribute they bring to the session, and all are special in thier own way. I actually wish each week that only one is available, so I do not have to decide.
But then again, I have a very particular set of wants and needs, which I do not think are shared by the majority of this site's users. For me, its not the young, hot, girls that make the grade, but rather the ones that pat attention to the need and provide service with a smile.