This video shows the intro of the show and gives you a glimpse into Carrie's life: http://www.youtube.com/watch?v=0QgRL9Ww2b0
Carrie may not be the traditional superheroine with X-ray vision and super strength, but she possesses all of the characteristics that a normal superheroine would. First of all, she has the defining moment where she decides to use her powers for the popular good. She explains in one of the episodes that before her sister's murder, she didn't pay much attention to her extraordinary memory; it was just sort of something she lived with. Afterwards, she made a promise to herself that she would never forget anything ever again. Secondly, she uses her superpowers to fight the bad guys. She is not physically abusing them, but she is using her skill to track down murderers and put affected families at ease.
Carrie covets the same awe and respect of her peers in the office that a superhero would hold from the townspeople. What's incredible is that this genetic defect is real. It is extremely rare, but it does exist, which means that if used for the greater good, we really do have superheroes/heroines living among us in the real world. There are so many ways to define a superhero/heroine, but Carrie Wells is absolutely a superheroine to those she helps in every case.