Is this just an expensive experiment?
Who knows, like Steve said, time will tell...
I did read elsewhere that they have had a couple of issues...one truck didn't make it back to the depot and had to be towed apparently due to a particularly hot day which could be an issue down the track what with global warming and all...
Anyhow, hopefully it's more successful than Janus Electric's trial where they lost 2 out of 6 trucks to fire...