By the same standard you wouldn't pay much attention to Freeman Dyson - http://www.sns.ias.edu/~dyson/ - or John Nash - http://web.math.princeton.edu/jfnj/ - either.

I have noticed that many of the best academics seem to like having horrendously appalling websites that look like they were built for NCSA Mosaic. I suspect that there is an in-joke I am missing. They probably have a contest to see who can construct the worst one.