I'd think that if the ABS system kicks in that you wouldn't get a 100% brake score. I would think that anytime the ABS kick on that you're not getting all your regen because the system pumps the brakes and I don't imagine that the electric motor can do that through regen. However, so far I have still gotten a 100% brake score every time I have had the ABS kick on both in our FFH and driving my parents' C-Max Energi the past few days. My next test will be to find a parking lot and engage the ABS while looking down at the ScanGauge amps flowing to the HVB to see if there is any interruption in current flow when the ABS kick on while still getting a 100% brake score. Has anyone else tested this?