How I Met Your Mother is down .4 for some reason - pre-emptions perhaps, but 2 Broke Girls wasn't hurt.
Voice is down to 4.5 in the prelim #s, but usually these singing shows go down when live rounds start. Last season's Super Bowl-inflated show was only at 4.1 for the first live performance show, then 3.2 for the first live elimination show. We'll see how this season holds up. Currently NBC stands as the #1 network for the first time since Friends ended...but the first quarter of 2013 is gonna be rocky, I suspect with weeks when they come in as the #4 network.