The matchmaking system is also plagued by lengthy loading times, but right now Naughty Dog is focused on solving them as fast as possible. (softpedia.com)
Not to mention there are some really lengthy load times that can be found throughout the game as well. (darkstation.com)
The game does feature lengthy loading times when loading into a map, ranging from 15 to 45 seconds, but the developer is allegedly working to improve this already. (gamergeddon.com)