I don't know what kind of evidence you want. I'm an attorney in the same field. I'm telling you he is well regarded. Graatch hardly needs me to defend him but as one of his peers (albeit a junior and less successful one), I can certainly speak to his success and reputation in the field. It's like Nep telling you that something reduces lag. You can either accept it or you can't, but it won't make it any less true.