Probably related to the same change that made guild exp grindable. Before, you could only turn in one Soothsayer's Runes type item per DMF (so per month) however, this DMF (post 5.0.4) it is now per day. I have turned in all the items twice over the past two days. This gives you about 9*275=2475 extra rep per day. This would mean drastically reduced time to exalted (although drastically increased time/effort/money to get the necessary items).