Well in the years prior there were zero and now there is one. This is an increase of infinity percentage!
Okay, beside the snark it is true, Apple should maintain security bugs better and "File Quarantine" looks to me rather rudimentary: http://support.apple.com/kb/HT3662
But as long as the "Trojan Botnets" he mentions are simple PHP scripts which are distributed years ago by pirating Photoshop and are simply killed by deleting the file and a reboot I personally stay feeling pretty secure.
I don't want to point fingers at Chicken Little, because I agree with the thesis; Apple needs to be more serious about OS X security.