Just after the BBC reveal about the 5 part story, the BBC have also revealed on the Official Facebook account that Doctor Who - Asylum of the Daleks will air on the same day in the USA and Canada as the UK. This is confirmed on BBC America's site here
While it airs at 7.20pm here on BBC 1 and BBC One HD in the UK, it is also been announced that it will return on BBC America at 9pm ET (remember that free slot?). The BBC America's website has not been updated as of yet. On Canada, it is also announced to air on the SPACE channel at 9pm ET.