That sounds about right. There's speed of thought (wetware brains currently win) and then there's speed of evolution. Digital brains definitely win that one. Because some wetware brains are spending all their time figuring out how to make the digital ones better. Nobody is doing that for the soggy kind.

The singularity will happen when the digital brains are figuring out how to make themselves better. Then they will really take off, and not slow down, ever.