I would say that if this wasn't a Sony handheld, but the precedent has been set in Japan. It can't even outsell the PSP on a week to week basis when even during the 3DS's worst weeks it was still far ahead the DS Lite and DSi.
Vita has literally fallen off the map. It's hard to remember at the times the thing even exists.
--
http://i.imgur.com/H7Tbg.jpg
http://card.psnprofiles.com/1/CaptainRockman.png