Hudson does a nice job coaching the girl -- and you can actually hear her improving with each piece of advice. That's what good coaches can do for a performer.
As for her qualifications, yes, prior to Dreamgirls Hudson was a novice at acting, but she went through extensive one-on-one training and coaching herself from Condon and others to be able to do the role of Effie (and sometimes coaching someone else is just a matter of passing on good advice one has gotten from others). It obviously paid off since she seems to be the favorite to win the Oscar for that performance. I wouldn't ask her for advice on playing Medea or Lady Macbeth, but as far as Effie goes, she knows that role as well as just about anyone around these days (excepting, perhaps Krieger, Mme. Holliday and a few others).
There's no need to criticize her for taking time out of what must be an insanely busy schedule to fly in and help out this little high school girl playing this role for the first time (though, probably not the last if those clips are any indication of her abilities). And knowing BET's paltry pay scale, she didn't do it for the money. It was a nice gesture on her part and she should be admired for her generosity, not slammed for it.
"What a story........ everything but the bloodhounds snappin' at her rear end." -- Birdie
[http://margochanning.broadwayworld.com/]
"The Devil Be Hittin' Me" -- Whitney
