Having worked both sides of the PR fence, I have seen my share of agency-client mismatches.
But I have often wondered to what extent agency size itself is a complicating factor. After all, many firms sell themselves on the basis of "more" - more offices, more people, more specific industry expertise, more specialized groups, and more integrated communications. You get the idea.
This is not to say that big agencies can't deliver. They must - otherwise, how did they get so ...