DAVEY: To be fair to someone like Tommy Carruthers, how many "world class" grapplers spar with "world class" martial artists from striking systems? Outside of MMA matches, I don't see many examples of the two systems going at it in a sparring context. Part of the reason is that the grappling arts can spar all-out whereas the sriking arts have to employ protective gear. One can use Bruce Lee as a prime example of the vast differences in training philosophies.
According to "world class" grappler Gene Lebell, his training sessions with Bruce consisted of the two men rolling on the mat to practice holds/chokes, but they did not spar all-out in regards to striking techinques. Bruce would show Gene a punch or a kick, and then Gene would hit a focus pad or glove. IMO, it is about the fighter, not the system.