If I went in understanding what ballet is -- the steps, structure, phrasing, posture, logic -- I would easily recognize these works as ballet, just as I would not recognize as ballet a lot of works that are danced in pointe shoes.
As an audience member, I might prefer works en pointe -- which I don't -- and might expect to see works en pointe, but I have internet access, and, as a rule, if I attend a performance at a ballet company, in five minutes I can usually find some written preview or choreographer's work on YouTube that gives me a general idea of what to expect. I could be surprised, and with programs of new works by company choreographers, I expect to not know, since they don't get as much advanced print/pixels.