It's definitely good because she's thinking about you and trying to figure you out.
However, I find that when this kind of thing happens, and I hear even slight passive aggression from a woman who initiates and doesn't get exactly the amount of attention or returned investment she's demonstrating, a red flag goes up.
It's the same thing with women who see red flags when AFCs do all these favors for them and then expect a return on investment and get butthurt, frustrated, or passive aggressive when the woman doesn't respond how she did in the AFC's fantasies.
A beautiful woman with a great attitude will willingly continue to reach out and reach out, send you lengthy texts one after another, regardless of how short your responses are, and not get the slightest bit insecure. She knows that you're a man and you've got other, more important things going on than her stream of consciousness texts, but she's thinking about you. That's if you've set it up properly. She knows you think she's hot because men typically do and you're not going to blow her off because men typically don't, so she doesn't feel the need to stress out about shorter responses to her texts. Compare that to getting any form of rebuke, whether it's ball-busting, joking around, or actual frustration, as in your current situation.
" to which I replied "Why would I be mad at you grandma? Lol" And she says "I dunno kid. Cause I'm kind of crazy and I like u." So I just said "Aw how cute haha" and she sent a winky face.