I struggle with this one too. My dd wakes anywhere between 5:30 and 7:00. My dh can get her back to sleep, I'm never successful. So if he gets up with her, she's back to sleep. If I get up with her, I usually hang out in her room in the dark for awhile pretending to myself she'll go to sleep, but again she never does.
So personally I don't worry about that one too much. It's too much effort for me, and I'm going to be awake anyway once she's woken me up. On some early wakings, dh puts her back to sleep, on others I get up with her.
I'm also curious what others think.