Basing opinion on citation index is like saying if this person is not widely cited he is likely to be wrong. From what I know, it is common for researchers in US and EU to cite each other. However work from say China or other Asian/African nations is not cited as often.
I know many (well-established) professors who don't bother updating their webpage. In fact some of them wouldn't have eve bothered keeping a webpage had it not been for the courses.
That said I will take this news with a grain of salt because it is not an easy problem and definitely needs a through review.