It seems much more plausible that either this wikileaks.info related cybergang is performing the DDoS themselves, stirring up other communities to perform DDoS, or both. I have no experience with this AnonOps group, but I have spent a lot of time looking at *chan culture. As haphazard as a collection of 'anonymous' users generally is, they do not actually get to the point of performing an attack against something without hearing many sides to the story. That is one of the benefits of having so many individuals actively involved rather than an army unthinking zombie computers.
For example, given enough .jpg's, between their collective experience they can collate enough data to link seemingly completely unrelated photos to the same household or person. I have seen this happen over the course of a few threads and the experience was like watching a higher consciousness at work. It totally blew me away.
They will have people who actually do look at what is specifically being blocked by Spamhaus, why, and verify the authenticity of said claims. When you have threads of people calling for destruction it may be hard to turn away the mod mentality, but when people start posting clear facts it can and will do so, leading to the impending attack falling apart before it reaches critical mass.
I don't know much about this AnonOps group as of now, but if they are made up of enough individuals even this article will definitely reach them. As to if they will care, depends what their real goal is I suppose.