Your due for an oil change based on the indicator, but you might want to consider that maybe the dealer did it and try forgot to reset the life? Who knows. I wouldn't let it prevent me from driving the car but I would be sure to get it done at the first opportunity.
You mentioned vtec, and your correct there- these cars have twin independent variable cam timing that advances timing based on oil pressure.
HIS: "Night-Mare": 2012 Mustang GT/CS, Black on Black, MT, 3.73 Gears, HID's, Security/Comfort/Electronics Packages. #2 of ????
HERS: "Blue Steel": 2012 Mustang V6, Kona Blue, AT.