I still see that gas is not a limiting rescource for terrans in many situations. That alone is a deal-breaker in a game where all races have equal access to resources and gas is defined to be the scarce one. Its corrupt design.
This hasn't been true since patch 4.0 and the ghost cost change. Any higher-tech Terran army now includes some combination of Liberators, Tanks, Ghosts, and Ravens. It isn't uncommon to see Terrans using all their gas and floating a thousand+ minerals in the late game.