Not exactly, as air units can fly and ranged units can shoot through the forcefield. The unit able to produce it is available too early though and it might be a major advantage during a base siege. It was also a stupid idea to equip units with the Blink ability, it seems to be too much of an advantage, especially if it can be used to jump on cliffs, for instance. I don't know if that's available.
Anyway, the Zerg seem to have a few hax abilities too, the Mind control for example. The guy took over those Colossuses nicely, that squad walked into the trap nicely. It also had a large factor of luck in it, despite that.