I have done the tour. Are you doing the actual Antarctica Tour or the Behind the Scenes tour that includes a visit to the penguins?
My guess is you are doing the actual Antarctica tour. If so the tour last about 60 mins. You meet behind the attraction and go into the building spend time learning about how they fix their meals, plan their diets, vet care, penguin facts from around the world and how SeaWorld recreated their habitat. The second half of the tour is spent in the cold part. They will bring a penguin into the group and let him walk around. They let you pose with the penguin for pictures. You won’t hold him but you can touch and get a nice picture. You do not feel hurried at all. The educator will answer all your questions etc. I love the Antarctica tour and i highly recommend it especially for a penguin lover.