Not over-rated. His record and number of times hes played not only a rear-guard but an ultra-attacking rear-guard when Australia has been in trouble speaks for itself. He's not a classical Test player but then, the text books are a merely an accumulation of high-percentage play borne from previous experience, not the only way of doing things. Guys like Gilchrist have the basics solidly mastered but just plays a little differently to the 'usual' Test player.
Next silly question.