To ask that, you have to be blind and deaf. How did you read my post and reply?
She stole Madonna's whole schtick. You cannot deny that. Sure, she built on it, but it is what it is. "Hey, instead of giant, pointy cones, how about GUNS for a bra! Oooo, I'm so original." She's pushing boundaries, sure. But Madonna was doing that when Stefani was still in diapers. She's not a trailblazer. She's merely following in someone else's footsteps. There's nothing wrong with that until you start claiming you're unique, and breaking new ground. pfft...
As to the songs, yes. They have different melodies, time, and slightly different keys. But you only don't hear the similarities if you're tone deaf, a "monster," or Lady Gaga herself. Everyone heard it. Hell, even MADONNA heard it. (I remember her commenting on it, but, alas, I cannot find the quote now) She has been graceful about it, taking it as an homage (which it could easily have been called until Gaga claimed it wasn't).
No, it's not out and out plagiarism. But the song structure, basic chord progression, and style are too similar to be coincidence. There's nothing wrong with it, seeing as Madonna was an influence on Gaga. That is, until Gaga goes bonkers whenever anyone points out the similarities. They're there. Everyone hears it. Most don't mind, but they do hear it.
Personally, I really don't care much for either of them. Just not to my taste. To each their own. But I - NOT a Madonna fan by any stretch - started singing "Express Yourself" over "Born this Way" the very first time I heard it.
Vanilla Ice once claimed he didn't steal from Queen because he added an extra beat in the bass line. LOL (I'm not comparing Gaga to Vanilla ice. That was true theft. Just found it humorous)