Wellllll, I can't edit it anymore, but yeah, got that totally wrong (original source was a real estate developer who's involved with a couple of the projects).

I suspect he took "about 60% more than any other city" and radically misinterpreted it (and I went and parroted him -- oops). Original conversation was right around when this article was published: https://www.seattletimes.com/business/real-estate/seattle-ha...

Apologies for the error!