Not going to comment on Jake, as that issue has been covered pretty well
However, I always wondered about fore-arm conditioning that people sometimes practice. I never saw a need for it.
I have had many people complain that their arms hurt when making contact with mine, and I wonder if it's just because they're more tense and tend to meet my force more bluntly. Granted, I am thin and kind of boney. But, I don't find that my more experienced training partners ever complain, and I don't find that my arms hurt even on the occasions that people deliberately strike at them (with empty hands, at least). So, yeah. Preventing damage to your forearms, I think, has far more to do with maintaining a less rigid attitude and deflecting force rather than meeting it head on.
I don't see conditioning that area as being the least bit important. But then, I don't employ a particularly hard style.