[greggman]

Is that really issue in SV?

I never noticed anyone caring that someone came in early, arrived late, left early or left late or taking a long lunch. They cared they got their work done in a reasonable amount of time.

That certainly the attitude I saw at Google. I assume it's the same at Facebook. Work wherever (office, home, coffee shop) and whenever you want. VC in for meetings if you're not on site. Get your work done.

Note: I also worked in Japan for 7 years. Both Japanese companies, both there was at most one other non Japanese employee in my division. One had strict hours, the other not. Of course the strict one effectively took roll call. But the other didn't. The strict one started with team cubes, switched to open office when they moved to a smaller place where there wasn't enough room for partitions. The other had personal-ish cubes. Most people had their own cube with partitions high enough you couldn't see over them when sitting down but could when standing up. A few at the ends of aisle shared a space for 3.