I did some controlled tests yesterday, where I intentionally didn't touch the wheel after engaging AP. At freeway speeds (65mph), the nags were just a bit shy of 30sec, which is what I'm used to. On local roads, when you first engage AP, the first nag happens really quickly (10-15 sec) but once you torque the wheel to clear the nag, the next one is longer (~30sec).
That all seems consistent with how it was before.
I haven't had a chance to test bumper-to-bumper nags. Those historically were really long (2 min or so).