Yes, on second thought, DJB would probably have much more impact working in a group that's creating crypto standards rather than just reviewing other people's proposals.
For what it's worth: that's what he already does. For example, Bernstein is one of the coordinators for CAESAR, the competition for new authenticated bulk ciphers.
I think that was salient's point -- he's already creating crypto standards and he's likely better suited to that than simply reviewing other's proposals.