Netsky virus alert from Symantec

Back in the office today after an extended 4 day visit to a customer (which was only scheduled for one day!) I decided to check that the NAV definitions were up to date (which they were) and to double check they would detect the Netsky.B virus. After waiting about 3 or 4 minutes for the list of virus's that Norton detects (wouldn't it be nice to have a search function?) to load I was able to confirm it did detect them. I then checked my mailbox and found a letter from Symantec, dated the 18th, which arrived this morning (20th) telling me about the virus. I thought the whole point of these Virus Bulletins was to give you a head start on possible infections, not notification two/three days after you read about it everywhere else and even the 4 year old from next door is asking your opinion on it (not really - hes more like 44 years old)