Submission title is somewhat misleading. Nobody appears to be claiming that e.g. a chimp engineered with the human version of FOXP2 (the single gene under discussion) would have human-style language capacity commensurate with its intelligence - just that FOXP2 is a contributing factor.

If true, I expect we'll see talking chimps soon: adding the gene is a neu-brainer.

I'm also reminded of Bruce Sterling's short story, "Our Neural Chernobyl".