They did not claim that the % passing the blinded stage is the same as the % passing the other stages. The only points they listed were interview #1, interview #2 and admission (none of which are blinded).
They said the blinded portion is only skimming the application, and they get that info after a minute or two. If they blinded the entire pre-interview process (e.g., browse github profiles/etc through a chrome plugin that changes "nitin patel" to "grande puta"), that would be fairly convincing.
Ultimately a quality measurement at the end of the process would be the best, however - measure the outputs rather than the inputs.
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They did point out that the first round selection is done based on anonymized applications.
It might not be not perfect, but if round 1 is blind to X, and rounds 2 and 3 admit people in similar ratios to round 1, it sounds pretty good to me.
They did not claim that the % passing the blinded stage is the same as the % passing the other stages. The only points they listed were interview #1, interview #2 and admission (none of which are blinded).
That sounds to me like the point where blind review of applications would take place.
They said the blinded portion is only skimming the application, and they get that info after a minute or two. If they blinded the entire pre-interview process (e.g., browse github profiles/etc through a chrome plugin that changes "nitin patel" to "grande puta"), that would be fairly convincing.
Ultimately a quality measurement at the end of the process would be the best, however - measure the outputs rather than the inputs.