Figuring in the SOC does reduce the "total" kWh available.

Thanks for pointing this out. Now, if I remember correctly, Mark Smith previously commented that the 08 Hybrid's SOC is now 35-65%. This can help explain the mileage improvement with that year's edition.
Oops! I forgot to ask if anyone thinks FORD is sticking with the 35-65% SOC limitations with the PHEV Escape?
2005 AWD Escape Hybrid
Best Interstate
tank trip MPG 39.02 (scangauge II) for 402 miles on I-70, 10.3 gallons used over mostly flat terrain.
Best
Interstate tank trip E30 MPG 34.6 for 271 miles along I-80 in Indiana and Ohio.
Best multiple road tank trip E30 MPG 36.2 for 202 miles in Southwestern Pa.