I don't think we can do much analysis without more data, but that said it wouldn't surprise me in the least. Women make up the majority of media fans. They are also far more likely to alter and reinterpret the original texts, "textual poaching" (again, Henry Jenkins is the prime guy for this, but you could look at Fiske, Hills or any number of fan researchers who would agree).

I would be interested in any of the raw data about players. Does Bioware publish any data on who plays DA:O? I imagine that the mandatory data connection to Bioware servers would give at least some rough data. Since they archive characters they could probably give information on who played it a lot vs. who played it once. I would also be interested in the data on the DLC. I know many more women who bought it than men, but that's just anecdotal evidence.