Link. Depends, I guess. It depends on whether the domain was self-reported or whether Jeff looked up the IP of the person leaving the comment. I wonder if it will turn out to be someone from one of Dell's agencies or whether it's another hoax.
Update: Jeff's original post said the comment submitter left his "domain," but he confirms in comments that he looked up the logged IP address. IMHO, either someone spoofed the IP address or the agency employee is busted (more likely).