On my camera the filename seems to match the shutter count exactly... so my shuttercount is 6955 and the filename in the preview display says 100-6955.
Also mine came wiht a shutter count of 0 (i checked my first photo it was 1).
My guess regarding your unit is that:
if I were a pessimist then it was a returned unit, or a demo/store model and,
an optimist view is that it was heavily tested by QA
Either way, I think in the overall scheme of things 2000 is nothing considering the K-5 is rated for 100,000 actuations(or was it 150k i forget).