Know what you mean; we had our summer run on Sunday, and it was much the same. I find a lot barrel into those blind bends a lot faster than I would, and so I'm always trailing by the time we get round. The solution is to go at my own pace and enjoy the scenery, or as I did on the second leg, follow a Square-Four outfit, that clears all the opposing traffic, and makes an easy pace.
Oh, and TomToms should be banned; that's cheating!