mmm though the tutorial said it was doing high polly in maya because he believes that Maya, while not as powerful as zbrush, has some powerful sculpting tools of its own.
Whatever tutorial you're going through, I'm going to assert that is perhaps not the case. I have not heard professionals anywhere use Maya as their primary sculpting package. (High Poly hard surface, yes, that can happen purely in Maya) Take the time to learn Zbrush.