I haven't seen this mentioned anywhere. Since all the silver crane maneuvers have the [good] subtype. Does that mean that they bypass DR/Good?
Also, amusingly, if an Evil character enters Stance of the Silver Crane, he gets a negative level :)
No, it's [Good] in the same way that casting the spell holy word is a good act. Using Silver Crane is essentially performing a good aligned action. Attacks that carry sacred damage on it, however, do bypass DR/Good.
Also - that's funny. Appropriate and funny.
-X