Steve I think that's widely acknowledged. If I recall it won the Emmy for Outstanding Main Title Design & Music for 02' as well as Best Instrumental Composition & Best Instrumental Arrangement at this year's Grammys. Kudos to Mr. Newman
I thought it was Frances Conroy playing the "alternate mother" just with a different look. Also, I thought the male, (alternate Nate), was actually Gary Hershberger (Matt Gilardi).