You're right. I didn't even catch that. 1' (foot) vs 12.3" (inches). Essentially the same thing. I guess I just assumed they'd list both in the same measurement scale. I guess that explains why I was thinking that being 1" (inch) away from something was really crazy, HA. Thanks..!
FYI, not as crazy as you might think.
MFD, or Closest Focusing Distance is film plane to subject.
Working Distance is front element to subject.
EF 100mm f/2.8L 123mm in length, Closest Focusing Distance0.3m.
Flange to sensor 44mm. 0.3m - 0.167m = 0.133m working Distance.
Use a hood, depending on dimensions, it could be about 2 inches from subject.
A Canon EF 180 has a working distance of approx 25cm, or 10 inches.