Ah, well, different context, same answer. Naive youngling hanging around gives the book a different, lighter kind of humor than I was expecting. I can't say anything bad about that kind of humor, it's just not what I'm willing to pay to read every month.
And I hate to say that, because I'm one of those people who wants more comedy in my comics. And I hate to say it, because I liked Starfire in the Teen Titans cartoon. And I hate to say that, because I really enjoyed the big sister/little sister dynamic Fire had with Mary Marvel in ICBINTJL. And I hate to say that, because I really want to read a comic where Power Girl runs a software company. But I am saying that, because the kind of humor seen here and in the previews for Power Girl #4 is just too silly for how I perceive a book about Power Girl.
I think of Power Girl as being the straight man for other, sillier characters: Blue Beetle, Booster Gold, Cyclone & Stargirl. She takes herself too seriously, and it takes an honestly, purposefully goofy character play off her. (If you've seen Firefly, think of how Zoe and Wash interact, sans romance; if you watch Chuck, think about how Casey interacts with Chuck.) Terra and Power Girl may be cute together, but it falls into my same gripe about the rest of the characters in Peej's book: it's too easy, there's not even friendly friction or differences of opinion enough for any quirkiness.
Again, please don't read this as a complaint. It's just not what I want to read.