"Free & Open Source Software won't matter when a Consultancy or Outsourcing company loads up a contract with tasks requiring many person weeks of expensive billable time."
True, but a lot of consulting time is also spent not on techies but also on project managers, programme managers, business analysts, enterprise architects and a whole manner of surrounding areas. These guys are often there to solve business problems, not technical ones.
"If there isn't a FOSS advantage, there's still clearly a commercial off-the-shelf (COTS) advantage."
Says who? What do you base this on? As I said earlier, a lot of consulting time goes into doing tasks which would be done regardless of whether an off-the-shelf product was used - .e.g. a business analyst will still have to figure out business needs.
"One of the main purposes of these sites (apart from serving static information pages) is to provide a portal for file download."
Is that in the report or is it an assumption?
"Commercial open source software packages such as CogniDox allow you to do this in a completely secure and flexible manner. It costs thousands of pounds, not millions, and it delivers those features out of the box. And it has competitors such as Alfresco and Nuxeo that can also do the same."
And there comes the plug. I don't know about CogniDox but tools like Alresco and Nuxeo are not the types of software that any organisation will just go and install and the costs of implementation will reflect that.