I don't want to say anything out of turn here, but I did read some things about Silverman that gave me "pause". She apparently was let go from her university post and has had an odd number of kids test in the 200 range, which has made some made some people anxious about her methods. Also, there was a New Yorker article about a HG boy who committed suicide, the link to the partial article is:
http://positivedisintegration.com/newyorker.pdf
She was the one, according to the article, who tested him and advocated certain decisions for him. I am not in any way implying anything negative, I am just aware of these issues with this doctor's name.

Again, I am just passing along something that I am aware of, not making any judgements since I haven't met her and am not an expert.