I have hired a lot of developers, working for different companies in different countries. And I have never ever seen a case where a developer did well in the WB

I have hired a lot of developers, working for different companies in different countries. And I have never ever seen a case where a developer did well in the WBI interview, was hired, and then turned out later to not be a good developer. However I have seen plenty of examples of developers (interviewed by somebody else) who didn't do a WBI interview and later was fired because they were not good developers. My point is that if you can't do a WBI, well then perhaps you are simply not as good a developer as you think you are. Developing is about thinking. And WBI style interviews force you to think for yourself without copy-pasting a solution from Google.