Total return I see (factoring in divs) since inception is 5.89% or an annualized return of 2.29%. Obviously these numbers were better before this latest mini-crash. That is before any fees...
CBOE has a few common Option Strategies that you can download and look at past results http://www.elitetrader.com/et/index.php?threads/new-cboe-benchmark-indicies.293277/