I had a quick look at the original scientific paper. They are looking at autism-associated copy number variants CNVs, where there are more copies or fewer, of particular genes or lengths of DNA. They are not looking at single nucleotide polymorphisms SNPs, or single nucleotide variants SNVs (these two are similar, except the latter disrupts the amino acid sequence in a protein and the former may not). SNPs, as far as I know, play a larger role in most people's autism than either CNVs or SNVs, which are usually described as 'rare'.
So, this study is only looking at a subset of the genetic variations that have been associated with autism, and one that is relatively rare. CNVs are found in only 5–10% of autistic people - usually those with more profound difficulties.
So, no 'cure' on the horizon, and the research is only relevant to a minority of autistic people.
