Found this on Beyond3D, user HokutoNoKen has translated report from the journalist of the Swedish magazine GameReactor
Swedish article is @ http://www.gamereactor.se/blog/petter/630144/?sid=dcb819730fc920fec151280ab2616dd2#comments
At Gamescom, Yoshida showed us PS4 GUI with Killzone that was not loaded in memory (13 sec mark, GUI has button for "Start" the game), and he jumped from GUI to MP gameplay in just 7 seconds.
http://www.youtube.com/watch?v=EaPoLJyDZmM&hd=1
Here is an translation
Swedish:
"En av de coolaste detaljerna som Guerrilla visade mig under besöket tidigare i veckan var hur snabbt Killzone Shadow Fall startar när man väl proppat i skivan i sin konsol. Från och med att man klickar på spelikonen i PS4:ans interna gränssnitt tar det endast 15 sekunder (!) för spelet att dra igång. Alltså, 15 sekunder innan man är igång och spelar. Något som tar flera minuter i Killzone 3 (exempelvis)."
English:
"One of the coolest detailas that Guerilla showed me during the visit earlier in the week was how fast Killzone Shadow Fall starts when you have inserted the disc in the console. From the time when you click on the game icon on the PS4:s internal GUI it only takes 15 seconds (!) for the game to get going. In other Words, 15 seconds before you are on the go and gaming. Something that took several minutes in Killzone 3 (for example)".
Swedish article is @ http://www.gamereactor.se/blog/petter/630144/?sid=dcb819730fc920fec151280ab2616dd2#comments
At Gamescom, Yoshida showed us PS4 GUI with Killzone that was not loaded in memory (13 sec mark, GUI has button for "Start" the game), and he jumped from GUI to MP gameplay in just 7 seconds.
http://www.youtube.com/watch?v=EaPoLJyDZmM&hd=1