It was just behind Kaspersky in 3rd qtr 2012 (both rated AAA) but passed Kaspersky for sole AAA rating for 4th quarter. http://www.dennistechnologylabs.com/reports/s/a-m/2012/
2012 4th QTR:
TOTAL ACCURACY RATINGS Product Total Accuracy Rating Percentage Award
Norton Internet Security 2013 388.5 97% AAA
Kaspersky Internet Security 2013 368 92% AA
ESET Smart Security 5 359.5 90% AA
BitDefender Internet Security 2013 348.9 87% A
Trend Micro Internet Security 2013 340.1 85% A
AVG Internet Security 2013 335.5 84% B
McAfee Internet Security 2013 305.5 76% C
Microsoft Security Essentials 30 8% -