I haven't seen this posted. Here are the EPA docs:
https://www3.epa.gov/otaq/datafiles/CSI-TLMUT00.0GL2.PDF
https://www3.epa.gov/otaq/datafiles/FOI_TLMUT00.0GL2_APPIPT1_.PDF
They do confirm the 500lb quantization hypothesis for range difference between 5 and 7 seat configurations.
Anyone know...