Please look at this :
http://www.shadowserver.org/wiki/pmwiki.php?n=Stats.VirusDailyStats
it’s about av products’ abitilities of detectin’ 0days threats.
but ,
0day Summary
vendor detected total percent
AntiVir 33,865 35,455 95.52%
Norman 32,184 35,455 90.77%
F-Prot6 31,370 35,455 88.48%
Avast-Commercial 28,858 35,455 81.39%
AVG7 26,794 35,455 75.57%
VBA32 25,662 35,455 72.38%
McAfee 23,058 35,455 65.03%
NOD32 23,030 35,455 64.96%
Kaspersky 21,657 35,455 61.08%
TrendMicro 21,334 35,455 60.17%
VirusBuster 19,897 35,455 56.12%
BitDefender 19,810 35,455 55.87%
Vexira 19,804 35,455 55.86%
F-Secure 17,619 35,455 49.69%
DrWeb 4,119 35,455 11.62%
Panda 2,230 35,455 6.29%
Clam 1,167 35,455 3.29%
Avast 825 35,455 2.33%
WHY? ???