Saw Linetskaya at Junior Wimbledon a few years ago, when she wasn't being hyped at all... all the attention was on Sharapova and Douchevina. She really, really impressed me - technically very solid, willing to fight to the last point.
Kirilenko played superbly at Roland Garros, but her overall results this year have been abysmal, which suggests that she rarely brings that sort of display to the court. Of course she can learn to play at her best more often, but I think the pattern is set now. I don't think she'll ever be top 5, maybe not even top 10.
I've never seen Chakvetadze play.