So, I'm kinda watching the new episodes on CN. I skim through 'em every once an awhile. I notice with Dawn, she seems to be really concerned with Ash whenever he's battling. And in one of the recent episodes she even put on a small cheerleading skit to cheer him up.
As I was watching I was thinking "I wonder why Misty never did that?" After I mulled it over, I realized as much as Misty supports Ash that's not her style. She gives support and encouragement (and an occasional wry comment) but she chooses to express her support for Ash in other ways.