Uhh.. I think it's common knowledge that the amount of non-metal pedal demos videos on Youtube far outweighs the amount of Metal there are. Almost every video I've ever come across are the same.. Some guy twanging on his Les Paul or Stratocaster through a Fender. Isn't there enough of that? I think so. Actually, the new criteria should be "If it can do Metal cleanly, then it can do all of the above mentioned (jazz, country, R&B, etc.)".