Moneysense top Canadian mutual fund for this year: good for your RRSP and for your conscience?

The top rated Canadian Equity Mutual fund this year in the Moneysense Honor Roll 2008 is "Ethical Canadian Dividend Fund". They have a 5 years annualized return of 'only' 19.12%, but they top the chart with a risk-adjusted return of 34.01%. What caught my attention is that it's an 'ethical' fund. Is it just a fluke or is there a new trend with socially responsible investing that could be leveraged to get better returns?

Here's the fund description found in Morningstar:

"The investment objective of the Fund is to maximize returns primarily through a combination of dividends and capital growth from Canadian companies. The Fund follows a socially responsible approach to investing. The fundamental investment objective may only be changed with the approval of a majority of unitholders at a meeting called for that purpose."