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.
http://www.nytimes.com/2013/06/20/business/in-head-hunting-b...