This reminds me of the PS3 launch (kind of). A bunch of exclusives went multiplat before release and people lost their shit.
Also as someone above said, this had to have been planned in advance. Delaying a game 19 days before release seems impossible, this was probably known for a while but for some reason the announcement was delayed.
Platinums: Red Dead Redemption, Killzone 2, LittleBigPlanet, Terminator Salvation, Uncharted 1, inFamous Second Son, Rocket League