Actually, I think truly remote teams are just rare regardless of affiliation - we're YC, 20 employees, and only hire remote for all the reasons outlined in this thread and others.
That makes the most sense to me as well. If you're planning on having a distributed team, doing it early on is the best, and perhaps the only, time to do it.
> As a side note, avoid remote employees in the early days. As a culture is still gelling, itβs important to have everyone in the same building. [1]
1. http://blog.samaltman.com/how-to-hire