If it makes you feel better we recently JUST got Windows 7 at work (A few months back they just upgraded to Vista Corporate), any way we do Autocad and some other stuff... My work PC? A single core intel unit without dedicated graphics and 1.5gb ram. (To be fair the AutoCAD design PCs are slightly more powerful, but they'd struggle with COD4:Modern Warfare)
Gotta love the government...
But at least we're allowed to use FB and Youtube... when the bandwidth will download a 1 minute low res vid in under 30 minutes it's quite nice... >.>