I've seen this often in southern california and chicago, the only two cities I've driven heavily; and despite having no interaction with Pittsburgh, I do it myself all the time...
I can't imagine how this is a Pittsburgh quirk; its the obvious thing to do when the option is available
Obvious to not respect the right of way? Or fall prey to insurance fraud if you misinterpret the "benevolent" driver who you thought was letting you jump the turn.
I can't imagine how this is a Pittsburgh quirk; its the obvious thing to do when the option is available