It should definitely help you pick the best AV! Here's an excerpt:
AV-Comparatives, provider of the world’s most thorough consumer anti-virus efficacy reports, has released its 2009 November/December study which assesses an anti-virus suite’s ability to proactively deal with new infections.
The proactive test uses two sets of samples labeled Set A and Set B. According to the company’s methodology report, Set A contains malware from December 2007 to December 2008, of which most tested products can detect at a rate of more than 97%. Set B contains 1.6 million samples from the last seven months including: Trojans (69.5%), backdoors/bots (20.7%), worms (6.1%) other malware (1.5%) and Windows viruses (0.4%).
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It should definitely help you pick the best AV! Here's an excerpt: