I know it's only two days, but wow that is an extremely bad start.
Both versions should be at ~5k combined.
The PS3 version should be right under the top 40 in the individual charts.
It's 8th (out of 10) on the Vita chart:
http://www.chart-track.co.uk/index.jsp?c=p/software/uk/latest/index_test.jsp&ct=110038