So reading through the rules on damage types and damage reduction they read as the following summary
Bludge\Peirc\Slashing yadda yadda these can have damage reduction Then it says energy - Not subject to damage reduction Then it talks about Precision damage as a whole new category specifically saying(note the part in bold):
Precision Damage: Precision damage is a special type of damage, which might more appropriately be called a "category" of damage because any of the other damage types listed here might also be considered "precision" damage under the right circumstances. Precision damage is usually dealt by classes like the rogue when he is able to catch an opponent unable to fully protect itself. Precision damage assumes that the target has a somewhat normal anatomy or at least has a physical form which might have weak spots which could be detected or taken advantage of. Previous editions of the game (prior to the Pathfinder Roleplaying Game) limited what sorts of creatures are vulnerable to precision damage more than the Pathfinder Roleplaying Game does. This was a deliberate change to make a key class feature of classes like the rogue more frequently usable. Attacks which affect areas (such as splash weapons) usually do not deal precision damage.
Are they implying that a sneak attack is not subject to damage reduction because its a new category all to itself? If not that, then what are they saying? Whats the point of calling it a new category if it doesn't have new rules?