Deep Throat, Shallow Footprint?

Defending his former reporters, Bob Woodward and Carl Bernstein, from charges that they were stenographers for an ambitious secret source, Barry Sussman, editor in charge of the Washington Post's Watergate investigation, says that Max Holland, author of Leak, overstates Mark Felt's importance to the story:

Deep Throat wasn’t an important source at all. He was nice to have around, helpful on occasion, especially in October, 1972, when he confirmed and added to a story in which the Post introduced Donald Segretti as a political saboteur against the Democrats. But that’s about it. Woodward and Bernstein have blown up Felt’s importance for almost four decades or nodded in assent when others did, and instead of pricking this big balloon, Holland pumps more air into it.

Holland states that for decades “the parlor game that would not die” – the search to uncover Deep Throat – had the effect of “elevating Deep Throat’s role as a source and cementing the myth about the Post reporters’ own role in uncovering Watergate.” Except Holland very much accepts the first part of that formulation.