This is a complicated issue, but in my opinion the google/facebook style of interview is the one that gives you less false positives, even though it gives tons of false negatives. In other words, very few people who can do it are bad coders (false positives), but many good coders can't do it (false negatives).
So, as companies like Google and Facebook have so many applications, they're much more concerned about false positives than false negatives.
So, as companies like Google and Facebook have so many applications, they're much more concerned about false positives than false negatives.