I ran the numbers in a previous thread and got numbers that contradict their claim. There's a car fire roughly every 3 minutes (rounding down; it's actually a bit over 3 minutes). In the 500-something days since the Tesla has been released, there have been a total of 3 fires.
If you want more fun, run the traffic fatality rates since June 22, 2012. Tesla is currently sitting at zero (it would be highly unrealistic to expect that to last).
Right now your link goes to someone else making that claim with no source and no work shown.