Very interesting report. I'd like to read an actual article though.
As to the 10-15% variation in aggressiveness, I'd expect that much variation within a hive because of polyandry. For such a finding to be valid in my view, the queens involved must have been inseminated with the sperm of only one drone (the same drone for all queens in the study -not practical I'm sure). Otherwise, it does not make sense to me to generalize these observations to all apis mellifera. JMO :-)
It's raining cats and dogs tonight tec, especially down your way, I have an extra life preserver if you need it. ;-)