Nothing official but unless m$ has changed, each previous title was held up 18-24 months for exclusion iirc and we were told this would be the last exclusive title by bioware.

The most recent example of Jade Empire released Apr 12, 2005 on xbox and Mar 01, 2007 on PC.

That's sort of why it's seems strange covering Mass Effect at RPGWatch, of course maybe I am missing something.