Well with Hinata, it's pretty much always on, her power. She can see through things and such, but she can't really turn it off. She'd probably pass though but it's not a complicated ability.

Sakura on the other hand? WEll she's good at what she knows how to do, but she doesn't really know why or how she does anything. IE, she doesn't really know what her power is? Just what it can do /orz so complicated. She'd pass, if they're testing what they know she can do.