Well you can't really be to surprised. However, they won't ever be infected close to as much as a Windows computer... My current Mac has never had a problem with anything like that and it's unlikely it ever will... at least not in the next few years.
its propaganda, sure apple doesn't have some sort of immaculate security system built into their OS, but it is solid enough that the exploits aren't fully exploited.
Apple has always had the risk of being exploited, they just aren't the target.