I’ve been getting them as roughly normal. Including last week, which was my last flight. In fact, a new one to me: at T-3, I got a reminder that I hadn’t yet checked in with my flight (normally, I OLCI, but for this trip, I was checking in at the counter since I needed a bag checked through on a separate * ticket).
come to think of it though, I did not get a text about a 20 minute delay on that flight. I’m not sure what the threshold generally is for that, though we were already onboard when this was announced. Delay was so we didn’t arrive into SIN too early, which is apparently a big deal there.