Gillian Taylor must have initially been disappointed with Kirk's ship

She's probably expecting something that actually looks like the Enterprise when she first beams aboard the Bird of Prey; white, pristine, high tech with lots of screens and flashing lights. Something that looks like 2001: A Space Odyssey.

Instead, she's in some dark, musty ship that probably still smells like burnt targ hair and expired Klingon food packs. I don't think he ever told her he was flying a stolen alien ship.