IM Worms Increasing?

ZDnet repeats a Akonix press release reporting that IM Worms have been increasing in November as compared to October.
Its kind of satisfying that 36% of the worms target more than one network. Back when IM Worms first came out they were occurring on the Windows Messenger network first and the Microsoft bashers were lining up to take their swings. Those critics fell strangely silent after more worms targeted the AIM network which is more widely used in the U.S.
Do you trust reports from security vendors? They profit by selling software to protect against X. So are they unbiased when they say X is on the rise (thus you need our product).