why are star ratings greyed out and say n/a for some ,but not for others ?

I think it's because there might be a minimum number of reviews needed before admin will give the provider an avg.  Just a guess.  If you really want to know, ask admin with the contact us button.

Swim

Hey 4Shot,

In order for TER to give a provider an average score, the provider must have a minimum of 5 reviews before the average scores are calculated.

Any provider who has 4 or fewer reviews will have their stars grayed out and have N/A in it.

Serpius

I'm just guessing you are looking at new reviews.

Ladies with 5 or more reviews will always have stars and ratings displayed.

Ladies with less than 5 reviews fall into 2 categories.

N/A and no Stars.  The latest review is new (since averages were last calculated) Even if she has other reviews, her average doesn't display on the first day the review is posted. (I know I didn't make that very clear)

Stars and Average displayed.  The averages have been calculated since the review was approved.  The latest review is probably over 24 hours old.

I think the averages get calculated every 24 hours.  Sometime between midnight and 6AM EDT.  Wait 24 hours and she'll have stars and a numeric rating.