While there could very well be something to back this up it could also be similar to the "Netscape Now" button that was very common back in the mid to late 90's. People doing it in other words because they are merely copying what others do. I think this is probably more common with startups because young people who do startups aren't aware of anything fresh out of school and are certainly more likely to mimic what they see others do. "Oh ok so we get a ping pong table".