David Greenberg, author of Nixon’s Shadow and history professor at Rutgers, has an essay up at the Wall Street Journal’s site comparing the expectations generated by President Obama’s first hundred days (or the first 60 or so that have gone by so far) and what’s been accomplished to the way previous Presidents have handled the initial 3 1/3 months of their terms.
The article is titled “The Folly of the ‘Hundred Days'” and subtitled: The term has been an unreliable indicator for presidential success; Nixon’s public-relations strategy. But the only real reference to RN comes in one paragraph deep in the piece:

[Nixon] had a bunch of his advisers form a “Hundred Days Group” to figure out how to sell the idea that his administration was a hive of activity, while trying, as he said, to get him “off the hook on quantity of legislation being the first measure of success.”

For a really careful and considered examination of RN’s approach to his Hundred Days, the reader is referred to Nixon speechwriter Lee Huebner’s essay “Richard Nixon’s First Hundred Days.”