I enjoyed how you phrased that. I work at a giant multinational and yes yes I know all about the stereotype that innovation only comes from the tiny little startups on HN, but innovation flows both ways, like it or not, and over the last decade one megacorp major cultural shift I've seen is collaboration only happens in email because its documented and highly accountable. If you really want to share opinions or idea or requirements or demands in a verifiable documented backed up permanent fashion then you put it in email. You don't have a "real" opinion until its written down and sent in email.
If you just want to talk about sports or the weather or gossip about colleagues or lie to someones face about a due date or product change or a spec, you exclusively do that verbally on the phone or in a meeting or text. Non email based collaboration is seen as a fake waste of time, because, lets face it, it is. If you're too much of a coward or crook to put your name to a statement, then its not worth reading. If someone refuses to document what they're saying in email or a bug ticket they are pretty much treated as liars or ignored. Its an interesting cultural shift. I have one older boss (yeah office space style I have a couple bosses, informally) who is all about the "personal" nature of a phone call or meeting, but its always super ineffective. He's still a nice guy and overall a good manager, but "old people thinking" is holding him back compared to the other mgmt who have moved on with the times.
It seems to work extremely well, especially with multi-office, multi-timezone, multi-national, multi-company teams. (edited to add, and this factors into the "scalability" mantra heard so often on HN... don't set yourself up to fail, operate like a big company from the start) And violating the "new way" by only communicating verbally or in meetings seems to dismally fail fairly often.
This large company innovation will probably spread to the smaller companies sooner or later.