Major banks hit with biggest cyberattacks in history
money.cnn.com
money.cnn.com
Given those facts, "biggest cyberattack in history" is rather overblown. (It may be the biggest DDoS in history, but DDoS just aren't that dangerous.)
[1] http://en.wikipedia.org/wiki/Operation_Aurora
[2] http://www.scmagazine.com/rsa-confirms-lockheed-hack-linked-...
EDIT: In this case the websites targeted aren't high-value or critical, however the value of data access shouldn't be downplayed.
Besides, this statement runs against the core principles of Risk Management, which recognizes the need to prioritize the use of scarce resources to protect the most salient risk according to a utility function that combines but the likeliness and the adverse consequences of each potential incident.
There is a lot of research in control system security about balancing extremely high availability requirements against bad data and commands coming in -- trying to answer the question "how do we run compromised" because sometimes you have to, at least for a limited time, to prevent bigger systemic damage.
Really?