Initially he gave no link to the users group or the camera store it wasn't until he was prodded that he gave that information. So I am not sure it is against the ToU since he was providing information he was asked to. It does not seem he was promoting his site or store.
That said if you link to a group you should be a Nikonian webring and have a link back to Nikonians. But since its not in his signature and I have not seen him use it before now I do not think its against the ToU.
Last it seems he was just mentioning something he heard in good faith nothing different than any other rumor. So I wouldn't be so harsh, the D700 forum was full of rumors prior to release of the D800.