nope. neck warping isn't about moisture entering the wood grain. in any case, if the wood is adversely affected by water then it shouldn't be used for guitars in the first place. if you get a chance to see the PRS factory tour video, you'd see that some stages of fine sanding involves water...
neck warping is mainly temperature/ force related, luckily fender agreed to the truss rod installation & everyone followed suit. leo insisted that it wasn't necessary, he claimed his necks were strong, he even made an empleyee stand on a neck just to drive the point home. however, it's not about how strong the neck was, it's about its reaction to temperature. many initial telecasters were returned to the factory because of warped necks... leo nearly went to court for it- customers claimed they were sold defective products... :wink:
HOFNER: how's your Spider amp coming along? any likely reviews here? 8)