I'd place this in the same category as the annual "Best companies to work for", "Most admired companies" and so on. 

A few years back, I attended a small gathering of fund managers that was hosted by a well know Wall Street transportation analyst.  This gentleman frequently brings his institutional clients together with real rail shippers so his folks can pick our brains a bit.  After his clients have had their opportunity to ask questions, the rail shippers are given a chance to question the fund managers.  I asked them how important a factor things like the "Best Corporate Citizen" or a high ranking on the Dow sustainability index played in their investment decisions.  The 6 fund managers in the room all looked around at each other and after a fairly pregnant pause, one of them said he would speak for the group.  The answer was "we could care less about stuff like this".

Curt