Your daughter is experiencing the opposite of what I experienced. I'll give you my summary. I had a lot of things happen in my mid-late 20's, started a study and was immediately love bombed. Always invited out to dinner, movies, picnics, game nights, etc. I was baptized six months after starting my study. The invitations started decreasing after my baptism until it got to the point where I could not get anyone to do anything with me. I even had people cancel service plans so they could go do something else (something fun that I wasn't invited to) and then was counseled for going out in service on my own.
They say that the things you do before learning the truth are forgiven but they still hold them against you. My tattoos stumbled others. The fact that I listened to metal (devil music) and punk (anti-authority) before I studied were bad. My love of horror movies, "thrill-seeking" (motorcycles, scuba diving), and violence (guns, grappling, muay thai) were all bad qualities. It didn't matter that I stopped all those things once I started studying, that I got rid of all my R-rated DVDs, all of my PG and PG-13 rated DVDs that had "spiritism," a bunch of books, all of my fighting gear, and most of my CDs and MP3s. I shaved my goatee, removed my piercings, changed my hair but it didn't matter.
Your daughter might think that things will change when she gets baptized but they may not and it may cause her emotional health issues to get worse. I remember hearing counsel from the platform to invite honest-hearted studies to do things with the congregation, to surround them with good association, so I don't understand why the person studying with her told her otherwise unless things have changed since I left.
I was in for about four years and getting out was the best thing I ever did. I don't really know what to tell you to do because she is being brainwashed and you don't want to push her towards them by saying the wrong thing. What you can do is be there for her no matter what she decides. If she gets baptized and decides to get out she is going to need your support because she will instantly lose contact with all of her JW "friends." Hopefully she will wake up and see them for the false prophets and conditional friends that they are. And her being drawn in is not a sign of lack of intelligence. I had a college degree and a good job when I started studying, I was just at a low point and they know to take advantage of that (they encourage it by saying that after tragedy a person's heart condition might be better to accept "the truth.").
Good luck with your daughter, I truly hope she realizes it's a mistake before she gets baptized, or at least figures it out before she has spent too many years in.