Now that most of you are at or almost at level 9o and working on putting together your pre-raid hunter gear, it's time to take a moment to discuss gemming for Mists of Pandaria. Like gear and enchants and talents, gemming is one of the areas where you can statically optimize your hunter's DPS.
While the benefit of choosing one gem over another might add up to an unnoticeably small DPS difference, once you add up the benefit of all your gems, and your gear, and every other tiny optimization opportunity, you suddenly have the difference between topping the charts or not; or the difference between downing a boss or not. Every little bit of optimization adds up into a big difference in DPS.
Mists brought us more than just upgraded versions of our gems: it also changed the itemization of gems to make some of our decisions more interesting.