Mine is always been inconsistent.
No matter how pressured and urgent, no matter how present and at the moment.
Usually in my case, it boils down to my sleep, stress levels and adrenaline...
Usually it's way slower if I wake up fine and feel better.
But overwhelming fast when not; indicating that as much as I perceived things too fast meant I'm being slow.
No matter what the activity is; sleeping in, being sick, busy, enjoying something, frustrated the whole time, tired, hyper, working, not working, free day, lazy...
Doesn't matter much. It's mostly distorted in my case.
But when I ended up with a day without executive dysfunction, I suddenly have a working sense of time.
Not too fast, not too slow; doesn't matter if it's boring or hectic; just "accurate".