Most of the reviews of The End Of Mr Y made comments about the deconstructionism and transgressive sex. Maybe as a life-long SF reader I am too steeped in perversity, but the sex didn't seem notably transgressive to me - a bit of light to moderate bondage and some role-play where the heroine (ST's familiar Mary-Sue) and her boy-friend pretend he's paying her for sex.
The question that has nagged at me through 4 of Ms. T's books (including one of the semi-suppressed detective novels) is to what extent her viewpoint character is her or what she would like to be like. Having read this http://www.danutakean.com/blog/?p=291, it seems that it is more that she did have a semi-exotic upbringing, rather than having a dull middle class one and wishing that she had an exotic one.
I think she makes a better SF writer than a detective writer or warrior against capitalism. Give the woman a Hugo, stat!