Speaking strictly on "Now": A guy already had a lead guitar cover up on Youtube by the time I listened to the song, which was maybe 45 minutes after it went live on Paramore.net. That's pretty frustrating for a guy who thought the song went live at midnight (because thats what the band had said) then it went live more like 10:30-11:00.

Broader terms: If a song comes out on Tuesday around the world, then the band should have it streaming on their website on Monday.