I'm not sure we can say it's accelerating. The techniques that adversarial actors use has always been changing and when they shift tactics it can take a while for an adequate defense is adopted. We're still dealing with sql injection in the owasp top ten. What I think would indicate an acceleration is when the most security oriented organizations continuously fail to defend against new attacks. If we start hearing about JPMorgan and Google getting popped every month or two, we're in trouble.