I only work weekends so I "missed" our JCAHO visit this yr (they showed up on Monday, and left on Friday late...darn) but I've heard from many of my coworkers that they followed patients this time. They followed a visit from registration/triage, to the room, to xray/CT, to inpatient room. They wanted to be sure we were reporting off correctly, patient's privacy was being addressed, and transitions were smooth.
It was *supposedly* not bad. The hard thing is doing everything the "right" way (by right, I mean JCAHO's definition of right) even when it is getting crazy busy.
Good luck!