It goes without saying that solving algorithm questions are only a part of the interview process. Candidates are also judged on culture fit and design skills.
I expect this to bite me as ageism in ten years, when a 23 y/o Stanford grad will be aghast that I don't spend my evenings playing with MeteorRails.js.
I'm not sure that shows up in hours of interviews either...especially when most (all?) of that time is spent on "technical assessment"
And people who are getting better offers at better companies.
You'll never know.