The delays on this game were lengthy: from the 360/PS3 versions over to the Xbone/PS4 versions. And now the PC versions gets its own delay, which isn't as severe, and comes with loads more content. This should be enough to convince you Rockstar isn't discriminating against PC users.
Nevertheless, there are too many people with extreme opinions on here: those who hate Rockstar for the delay, and those who love Rockstar for delaying the game further. Because we want devs to be more honest with their release dates, and not to release buggy pieces of crap.