I made it pretty clear that I agree they're overrepresented, but quoting the wrong base rate makes it look like a much bigger deal than it is. I work at a NY-based rather than CA-based company, and while the same is true there, we see a lot fewer Asian people in tech than the nearly 50% that West-coast firms claim.
It depends on what you’re doing. Some verticals in my neck of the woods are 65% or more Asian, mostly because the candidate pool is tight and often requires relocation.