I have to chime in here and say that I too hope Ran is correct here!
I love the Sansa and Sandor scenes, and was gutted they weren't featured more in the HBO series. I was hoping this episode would include a bit more at least, but even GRRM can't completely undo what was done earlier in the show (that is, to downplay it).
I also firmly believe the 'San/San' (I'm scared to even say that phrase on these boards some days!) element was toned down in the series due to the even bigger age-gap between the actors in the show than the already-wide age gape between Sansa and Sandor in the books. Despite loving this odd pairing (in terms of enjoying seeing them interact), I can see how TV audiences would find it disturbing or hard to understand if a) he was a lot more violent and angry towards her and

he was even remotely 'sexual' towards her.
Perhaps I am just rationalizing. Of COURSE I know this was written by GRRM, but for me.....'San/San' won't be 'dead and buried' until the characters either never meet again or die horrible deaths, or the novels end without any resolution between them whatsoever. All of which are certainly possible. Nevertheless, I refuse to believe that lack of book San/San this episode means anything other than ....this is not the books.