Not that I would strive for it myself, but I think at least it was honest that the job posting was upfront about the requirements instead of being silent about it and then peer-pressuring the employee into 70 hour work weeks anyway because everyone there does it.

Who knows, maybe being upfront about it causes the applicants for the job to self-select for those who are confident that they can productively work 70 hours? Maybe the research only applies to normal people like us and the mythical super engineer they are looking for can do it (pure speculation, I don't know the research - I guess even super programmers have biological limits).

Then again, it's probably right to be wary of such job postings so that they don't create a general atmosphere in the industry that such working hours are necessary, whether you want it or not.