Yuki- It's not about collection methods it's all about the malware age. Bringing the thread back to WD, for any that have played around with malware that is being actively pushed out into the Wild it would be seen that WD has a poor record. In the next day or two WD may indeed then give stellar results- but sadly this would be against malware that now could be considered relics. Excellent observation! The only worms that the Pro AV testing sites are familiar with are those burrowing around in their gardens.