Occupancy Levels for C&S Buildings

I received the following comment from a LEED reviewer; "The LEED Form states that the project is mechanically ventilated and that the ventilation system has met the minimum requirements of ASHRAE 62.1-2007. However, to demonstrate compliance, the following must be addressed. TECHNICAL ADVICE 1. The total peak occupancy of 437.05 people documented for this prerequisite varies substantially from the total building users of 1,797 people reported in PIf3: Occupant and Usage Data. The peak occupancy should be reported consistently among all credits. Confirm the appropriate peak occupancy for the building and update the peak occupancy and/or the diversity so the peak occupancy is consistent among all credits or provide a detailed narrative describing the difference in occupants. The ASHRAE default occupancy should not be used when the expected occupancy is known". As our building is Core and Shell we actually don't have the final occupancy figures. As per the LEED reference guide "Projects that do not have occupancy counts must use the default occupant densities provided in ASHRAE 62.1–2007 Table 6-1, based on the intended use of the space". I would be of the opinion that we should use default occupancy values ? Whats peoples thoughts on this.