My dd is only 5 weeks old, but I think I've noticed some of the same -- she seems more likely to react to other people than to me, to look at them and even smile at them. She shows some signs of recognizing DH, but I don't notice the same signs with me.
I assume it's because she's not differentiating between herself and me yet - maybe she doesn't see me as a separate person. Or maybe I'm so baseline, because I'm here more consistantly and she knew me from the womb. Maybe it could be something similar with you guys?