Of course she is. And people who desperately want to prove she isn't falls into two categories, either SJWs who have no argument, so just call the other side sexists, or those who exaggerate scenes or just plain make up stuff that weren't in the movies to show she isn't.
A key example is the fight with Kylo. A near Jedi who has had at least a decade of training, and on both sides, is easily beaten in battle and in using the Force by a character who received absolutely no training, nor know everything that you could do with the Force. What are the excuses? "Oh, but he's emotional, so that hurts his ability." Eerrrrrr, wrong. Nowhere in the film is this even hinted at. He is still very capable, even in the few scenes where he loses it. "Oh, but he got shot, which drastically hurt his abilities." Eerrrrrr, wrong, again. You go back and watch that scene, again, and I dare you to try to point out where it's affecting him. He's swinging his lightsaber perfectly fine, keeping up with Rey as she is jumping over rocks to avoid him. Nope, it's just at that point she becomes a near Jedi because the script needed her to. She even out mind reads him, not even knowing she can do that, and out Force pulls him, again, even though she doesn't know that she can do that with the Force.
Then, at the end of TLJ, without any actual training, can lift a ton of boulders without even breaking a sweat. Mary Sue to a tee.
