Top sectors by Return on Equity

Cigarrettes and alcohol I can understand, but why would "Information & Delivery Services" have the top Return on Equity (ROE) by sectors?

http://biz.yahoo.com/ic/827.html

Top companies by market capitalization in this sector are Dun and Bradstreet (DNB), FactSet Research Systems Inc. (FDS), DST Systems Inc. (DST), and Interactive Data Corporation (IDC). I guess something about providing financial information generates efficiency!

Number 2 on the ROE ranking is cigarettes; third is "Aerospace/Defense - Major Diversified"; and in the seventh slot we find "Beverages - Wineries & Distillers"

http://biz.yahoo.com/ic/l/roe.html

I guess the sin investments (alcohol, tobacco, gaming, defense) are worth another look - although the FocusShares ISE SINdex Fund (PUF) is closing. There is a mutual fund in this sector, VICEX.