She's older than Superman just because her growth was stunted due to being placed in suspended animation she's legally an adult.
Voted "Biggest Waste Of Space" On The Bat-Boards For "Multiple Reasons"
Jerry Falwell On Rudolph The Red-Nosed Reindeer: "Those hollywood, homosexual, jewish types making a show about a reindeer who is 'different' and just cant 'hide it'. Everyone knows if he tries hard enough he can convert himself to a normal, black-nosed reindeer."
Quote: King Snarf said: Now, didn't Supergirl #0 come out before this? Maybe the answers are in there.
Supergirl #0 is actually Superman/The Bat-Man #19 with a new cover, which was an unpleasant surprise even considering I was expecting something as crappy as this issue. A reprint of a random issue of a completely unrelated comic, maybe even a Marvel one, would have been less disappointing.
That's about as useless as the time they offered an added "bonus" to a Superman issue, where for a dollar more they include the story originally presented in Superman: The Ten Cent Adventure.