User blog comment:Artemis C./SuperGirl/@comment-5458789-20121011122002/@comment-130.18.107.7-20121012171208

If it was Kara, then probably just a little bit, but in regards to the strength and indestructability, she would probably still fly and have the laser and xray vision, but she wouldn't be as strong or indestructable as Superboy, just to keep it mixed up.

On the other hand, if they bring Cir-El, the supergirl from the future as possibly Impulse's girlfriend who came back in time to help him out, then they might do her like Impulse and have just as powerful as Superman.

I kinda advocate the second one.