Though not particularly self explanatory these graphs show the difference that having "Optimise for SLI" turned on in Call of Duty 2 makes, thus answering the question - is this a single GPU or not?
/008495|2bee_3028-codsli1.gif
/9d270d|94bf_3028-codsli2.gif
/248105|b599_3028-codsli3.gif
/926c4b|5db4_3028-codsli4.gif