I was hesistant to respond to your question, but since I'm up "shopping" myself, I decided to add my two cents.  I took a quick look at your reviews to see your "trends" if you will and here is what I noticed. Of the ladies you've seen their average appearance, by your standards, comes to a 5.75 and their average performance came to a 5.75 as well.  Going a little deeper I checked to see "where" you found them  to get a trend.

Now who you see is your business, but my question to you is, are you unhappy with the service as well or just with getting a date.  I'm guessing since you tend to rate everyone around a 5 that you are happy with that. I would summarize your issue as such; while finding the right lady is like shopping in a large store, you seem to be going down  the same aisle. Again based on your reviews you appear to be happy with the results, but the flip side is you occasionally run into the problems mentioned in your post.  Try another "type" of provider, maybe one that has a website too, from another search site, continue to do your homework and maybe your results may inprove.  Personally, the only problems I have are on my side due to my schedule.  

Good Luck