There is no exact word why the PC version has been delayed, but the rumors suggest that a number of potential factors could be the cause. Still, the leading thought is that the company wants a separation between the console release and the PC release in order to maximize profits. Recently, several developers have been complaining very loudly about piracy on the PC platform affecting sales on the console platforms.
I totally understand their gripes about PC piracy but now they want to blame lower than expected console sales on PC piracy?
That's just bull****