Sorry Bob but the reference that you gave supports the fact that you made an error.
I'm afraid I do need to disagree, and my understanding is sound.
For some years I have operated both a CNC three axis router (moving spindle) and a CNC three axis milling machine (moving table), so I do understand the difference.
I quote from the text in the CNCexpo.com,
The thumb represents X axis, the index finger Y axis, and the middle finger Z axis. As opposed to your article,
Those three fingers are now pointing in the directions of positive X (second finger), Y (index finger) and Z (thumb).As I said not a big deal but I thought you might like to have it read correctly.
Greg
PS here is a clip of the supporting picture on the CNCexpo page,