Not sure about the discrepancy, but the first fast cooler takes it through a zone more inline with human temperature ranges. So if bacteria are more likely to survive in a temperate climate. 140-70 cool should be faster. Less time to reproduce, less time in "the zone" Below 70, I'd believe there are fewer, but still some, bacteria/fungal/viral issues. Scott
Oh It'z BBQ!
6 Kayaks(tarpon 160i, 2 tarpon 120's, a hobie outback, hobie tandem, and a Kaskazi Dorado)
Carolina Skiff J16 - "Calusa Wanderer"
1 Weber Gold Series Grill
1 Smokey Joe Platinum
1 XL Big Green Egg
KCBS Certified Judge #9079