I think thats a pretty good number compared to other launches.
Previous NPD November launches for comparison:
Xbox (2001) 720,000
Gamecube (2001) 660,000
Nintendo DS (2004) 370,000
Xbox 360 (2005) 326,000
PlayStation 3 (2006) 197,000
Wii (2006) 476,000
Shamelessly stolen from NeoGAF.
VITA 32 GIG CARD.250 GIG SLIM & 160 GIG PHAT PS3