Is there documentation of research and clinical evidence to support claims about Natural Language Acquisition?

While Marge Blanc’s 2005-2006 magazine articles in Autism & Asperger’s Digest, and her 2012 book Natural Language Acquisition on the Autism Spectrum, have often been cited as research in support of NLA/GLP, it is worth taking a closer look at those documents to assess whether they actually contain a report of research.