Google self-driving car gets rear-ended in 13th accident since 2009

Google is only even announcing it because were there to be even suspicion that a google car had been the cause of an accident there would be hysteria (irrespective of the statistical reality) - so they don't want to look like they have anything to hide.

Fair enough on Google's part. By why is Ars reporting a complete non-event? Is news that slow atm?