I agree with the "exhibits clear and concise thinking" points below, but I also think it has a lot to do with being a distributed company. They communicate via

I agree with the "exhibits clear and concise thinking" points below, but I also think it has a lot to do with being a distributed company. They communicate via email and Campfire all day, and their main marketing channel is their blog - which multiple people write for - so being able to write is of even greater importance for them.