Each expansion has placed gear behind rep. The only exception was classic. They put patterns behind rep and then made you make your own gear. Not sure why Mists should be any different.
http://www.wowhead.com/faction=1204/avengers-of-hyjal
http://www.wowhead.com/news=176361/c...wards-and-more
http://www.wowwiki.com/Northrend_reputation_rewards
http://www.wowpedia.org/Burning_Crus...tation_rewards
http://www.wowpedia.org/Classic_reputation_rewards