Power Girl is the JSA's strongest member....not JLA.
That would mean she's stronger than Cpt. Marvel (Shazam) but not necesarily Supes (though it's probably close). But she's lacking in durability, speed, etc. so WW would eventually beat her down.
Power Gilr stronger than Captain Marvel? I doubt that. Captain Marvel has been said to be Superman's equal. Maybe even stronger that him.
Unless shes stronger than Supes, shes not the JSA's strongest muscle. I think with more experience, eventually she'll be able to beat WW. Strength wise they may be the same, but WW has the experience edge. Power Girl is more powerful though. WW wins for now. 5 years from now, i'd say Power Girl.
Ive heard that shes beat CM, but I dont quite know what happened with that. But Supes has also beat her. But Superman has never beat CM. And it has been confirmed by Supes himself that they are equals.
MM even said that he could give Superman a run for his money.
according to the DC encyclopedia she is supposed to be the jsa's strongest person, also i have read it at a couple DC sites. and i thought that no one was supposed to be stronger than supes, and only wonder woman was second to him
I have the DC Encyclopedia, and they say NOTHING about her being or suppose to be the JSA's strongest person.
CM is Supes equal, he hasnt proved to b e stronger as of yet, but its possible because he hasnt reached his ful potential yet. WW second to Supes in the JLA, but CM isnt in the JLA. And everytime Supes and CM fought or had contests of strength, its always been proved as them to be equals. Strength moreso.
Power Girl herself said that she was the strongest member of the JSA. Maybe she's just a braggart, but Cpt. Marvel didn't srgue the point or even look insulted. Marvel would win a fight (and Power Girl didn't argue that she'd beat him) because he has the advantage in durability, speed, and has some magic. So it might not be "official" that Power Girl is the strongest, but the JSA seems to think so, so that's good enough for me.