You guys are putting way too much into this.
Unless she pulls out her card/cash to pay for it, the guy is responsible for paying for whatever meal it is. That's how I feel, how I've been brought up, how I've lived my life.
Essentially unless she offers to pay for her side, don't expect her to. I've been on dates where they wouldn't let me pay for their side, I've also been on ones where you can tell it's expected that I pick up that check. Neither has bothered me, you just need to make sure you do whatever keeps you out of the dog-house.