It's hard to set much store by early sales performance, particularly after the evergreen 3DS faced such a rocky road. Nevertheless, the Vita's latest stats do look disappointing for such a highly anticipated -- not to mention high-quality -- console: after shifting a remarkable 321,000 units during its first two days on sale in Japan, it could only muster 72,500 in the whole week between December 19th and Christmas Day. In comparison, the PS3 sold 76,000 units during the same period, while the 3DS rang up half a million. This doesn't necessarily reflect a lack of interest, however: there have been stock shortages, and it's also possible that buyers are waiting to make sure that all the launch bugs get cleaned up. As for us, our alarms remain firmly set for February 22nd.