Agree - most of the interviews I have had have been 1-2 hours plus some sort of coding test or similar. I guess if you are trying to recruit people already in a job, you can't get away with that much more than that - unless the job is super-amazing, you can expect people to take a day off work but not more than that. I don't know that longer interviews etc. would actually have told the interviewers massively more about me, perhaps a tiny bit more but not a lot.