Link to the latest Malware research Group test which included the following:
1. A-Squared Anti-Malware 4.5.0.29
2. avast Antivirus Professional 5.0.462
3. AVG Anti-Virus Professional 9.0.801
4. Avira AntiVir Premium 10.0.0.597
5. BitDefender Antivirus 13.0.20.347
6. COMODO Internet Security 4.0.138377.779
7. ESET Nod32 Antivirus 4.0.474.0
8. F-Secure Antivirus 9.22 build 15450
9. G DATA Antivirus 20.2.4.1
10. Kaspersky Anti-Virus 9.0.0.736
11. McAfee AntiIVrus Plus 14.0.306
12. Microsoft Security Essentials 1.0.1961.0
13. Norton AntiVirus 17.6.0.32
14. Online Armor++ 4.0.0.35
15. VIPRE Antivirus Premium 4.0.3248
Think you may be surprised by the results (at least for one product!)
http://malwareresearchgroup.com/?page_id=2 The results on available on the pdf