Yes, yes and yes to all of the above posters.
I was in your shoes a couple years ago. My daughter had a similar HS resume. She is also an exceptionally positive, optimistic person. I was outwardly not assuming anything, but inwardly wasn't worried at all. As another alum told me, "You can't possibly believe that [our] house could cut her, do you?"
Sure enough, my own chapter cut her. I was stunned. The other greek alums in our community were stunned. She pledged somewhere else, ended up loving her greek experience, and life goes on.
What you have to remember is this: chapter recruitment decisions are made by 19-21 year old young women. It is an imperfect process. When my daughter called absolutely devastated after being let go by my house, she said, "Mom, they didn't like
me!!" To which I replied, "Honey, they didn't KNOW you." She felt very
personally rejected because it obviously wasn't due to a lack in her activities/grades/references etc.
One of my favorite threads is the Recruitment sticky on "You'll end up where you were meant to. . . " Sometimes the system works the way you think it should, and sometimes, frankly, it is very capricious and arbitrary.
To this I would also add: legacies are often not given the same deference that they were 25+ years ago when I was in school. As many on these boards will tell you, often enough legacies go through these days to fill a pledge class. Chapters cannot possibly take them all. Legacies often get an automatic invite to the second party, and that is the extent of the additional consideration.
You are right to be mentally prepared for any possibility before recruitment. Now, after giving you the worst case scenarios, you are to be congratulated on raising an accomplished daughter that has an excellent resume. Yes, many others at UT will also have strong credentials, but hers will be among the best. There is no reason to think that she won't have a very successful recruitment, whether that ends in her affiliation with Chi O, another chapter, or the decision not to affiliate at all. Good luck to both of you. (It is a much more intense week as a mom than I ever thought it would be!!) I hope you follow up and let us know how it turns out for both of you!