I had a similar experience while I was in undergrad. My first CS class was a weed out lecture class with over 200 students. I was one of five females. I definitely felt singled out in the class and I felt as if I received special treatment on projects. I ended up changing my major to the social sciences. In your case, maybe you should view it as something positive. The person you talked to did say that they accepted women in their program if all the variables were equal, so I don't think you should feel like you were accepted because of your gender. The harsh reality is that computer science is primarily made of men, but at least this school is aware of the gender stereotyping that occurs in our society. Congrats on the acceptance!