Thanks Eric. It should be pretty safe to take the counter as true then. Do you think 18,500 is high? Not sure what the shutter life is on a 1Ds
PeterP, It's in the EXIF information. It's not labeled as anything interesting, but using Opada's Exif viewer the count seems to be the third figure along on the line labeled "93".
The figure looks right and it increments on each picture so I'm pretty sure that's it