Ok, interesting discussion.
According to ther FDNY Operational Reference (by Jim Griffiths), "Rescue companies are also assigned on boxes if closer than the first due ladder company"...
Prior to their move, R3 was closer to box 3127 than the 1st due truck (L27). Now that they have moved they definitely are not closer than L27, or L38 for that matter.
BUT....the Op Ref also says that "Rescue companies are also assigned on...street boxes associated with specific hazards", which could be the case here due to the Con Ed station.
The dispatcher the other night specifically stated that R3 was "first due". Was that incorrect, were they just assigned on the box? Or if correct, does that mean that companies arriving before them wait for R3 to investgate the hazard? Or did STARFIRE just post it wrong for the dispatcher because it has not been updated as to R3's new location?
After we figure this out we can try how many angels can dance on the head of a pin.