I've experienced both ends of the spectrum, from true girl-friend experience to ROB, and both can be found at each end and in the middle of the age spectrum. Note that the OP hooked up with a well-reviewed date. Most of us don't pass out 9's and 10's like candy. I'm willing to bet a month of VIP that your date either hasn't been reviewed often or didn't hit consistently high scores in both categories, or you didn't pay attention to her reviews before you contacted her.
As always, YMMV. If you are consistently burned by any group, but not others, you may want to pay some extra attention to how you interact with them. I know that this hobby has helped open me to groups of people I may not have ever met otherwise. The Golden Rule is nice,but the Platinum Rule, do unto others what and how they want to be done, works better.