In total, 5,929 total usable responses were received by the close of the survey on September 10, 2010.
In order to qualify for rating in the survey, providers needed a minimum of 35 total client responses. In order to be rated in a particular asset category, a provider needed at least 15 client responses in the micro, small, or mid asset categories, and at least 10 responses in the large or mega asset categories. Quartiles for participant services and sponsor services were calculated in each asset category in which a provider qualified for a rating.
You can find the standouts listed in a variety of categories, both participant and plan sponsor services, ranked in five different market segments at http://www.plansponsor.com/2010_DC_Survey.aspx