I'm the man to speak to here. I can speak from experience when I say that any woman of any kind of value will run a mile if you send out facetious/downright nasty texts just because she takes a while to reply. I blew it with a cool girl by using some smart-alec, snotty line to call her out on the fact she hadn't text me back and it wasn't cool.

Best solution: don't mention the fact it takes her a day or so to reply. Keep doin' ya thang, occupy yourself more so you don't notice shit like how many minutes she's taken to reply to a text.

Next best solution: pop off a cheeky text along the lines of "too cool to text me back straight away are we? Your face is gay". Throw in a "" for good measure.