Webform submissions are held in the database and not nodes. Therefore views can oly see the sid and none of the form data directly. To connect views to the form data
1. download and install the data module
2. download and install the webform mysql data module
see http://dev.nodeone.se/node/666 for details on how to set it up.
Basically, one needs to join the output of these modules for a given webform to the webform sid that views sees, then the table data is accessible just as if it were node data.
June 12, 2012