I am probably not a good person to answer, because I pay my models, rather than doing TFP, but that's not going to stop me. My answer is "it depends on the model release".
With one model (and only one so far), I signed a release which gave her right of disapproval (I really wanted to work with her, so I caved on this point
), so I had to wait. To make things worse, she was interstate for what felt like ages!
With one other model, I signed a release which said I wouldn't post any image that showed, um, "too much" (it was defined more objectively in the release!) - I posted non-controversial images before she saw them, but held off on anything she might want to discuss.
In my regular release, the model does not have right of disapproval, so I can post images with a clear conscience. I'll still listen to a model's opinions, and I took down one image that the model didn't like (she felt it made her nose look too big...).
To paint a complete picture, though, I should mention that I'll often e-mail a selection of images to the model as I process them, so often the model is the first to see them (well, other than me, and my cats
) . On a few occasions I have received a return e-mail "please don't use THAT image" (various reasons - loose hairs, makes a body part look too big / too small, the usual sort of thing). I guess that's the sort of feedback you are waiting for, too.