I am not sure if you read the article but they never claim that they have found a correlation between performance on technical interviews and ability on the job

I am not sure if you read the article but they never claim that they have found a correlation between performance on technical interviews and ability on the job. Yes, brainteasers are worthless and "structured behavioral" questions yield better informations but there is a gap between claiming that technical interviews are worthless and that. Also, it is usually the duty of the author to support their claims with a direct reference to sources not the opposite.