From that article:
The DDoS attacks appear to be originating from compromised computers located primarily in the Asia Pacific region and are being delivered as plain-vanilla floods of ping, syn and UDP packets, said the person, who asked not to be identified because he wasn't authorized to share the details.
[ ... ]
There seems to be some confusion about just how powerful the attacks are. The person familiar with the attacks said they were relatively modest.
"Most are easy to mitigate," the person familiar with them said. "I'm surprised any of these attacks are as effective as they are."
But an unidentified person briefed by government investigators told IDG News the attacks directed as much as 20 gigabytes to 40 gigabytes of bandwidth per second during their height over the weekend. They have since settled down to about 1.2 gigabytes per second, IDG said.
Simple floods? A modern router/firewall combo can easily take care of these.