Thinking about everything else said in this thread, I think the type of interviews these companies do sort of make sense. After all, all the good talent that knows its own value is already gone; all that's left is a mix of the incompetent and the undervalued, and they're trying to pick out the undervalued.

That requires a lot more rigour than the US process, which basically consists of "hey, we're offering [huge salary], compete for it."