BlackBerry (BBRY) slides another 6.2% premarket, with Goldman cutting to Hold amid the soft AT&T launch. Citigroup reiterates its $6 price target, saying internal checks show sales of the Z10 have dramatically slowed and carriers have shifted promotions to other products. "Shockingly low support by AT&T with extremely limited signage ... most AT&T employees (have) not even been trained on the device."