As far as I can tell, his only public reaction is a line in Sparrow 2014: “A recent treatment of this topic by Shulman and Bostrom^6 calls the same technology ‘iterated embryo selection’ - a name that Matthews and Fujita et al may prefer.”. So, he never acknowledged being scooped.
How has Sparrow reacted to the point that this idea was previously written up in some detail by MIRI?
As far as I can tell, his only public reaction is a line in Sparrow 2014: “A recent treatment of this topic by Shulman and Bostrom^6 calls the same technology ‘iterated embryo selection’ - a name that Matthews and Fujita et al may prefer.”. So, he never acknowledged being scooped.
Although after more looking into it, if we’re going to argue about priority, it looks like IES was actually first proposed a decade before MIRI did, in Haley & Visscher 1998′s “Strategies to Utilize Marker-Quantitative Trait Loci Associations”—their Figure 5c is unambiguously IES.