Is that really any less odd than the fact that Sabrina regularly pauses time for 24 hours of subjective time in order to gather her thoughts and decide what to do next? Come to think of it, this is one of Sabrina's meta-powers that we haven't mentioned to anyone, even Homura.
You say that like it's some awesome advantage.
It's not. It's a form of brain damage. Seriously, Sabrina's perception/memory of time is so fucking distorted it's not even funny.
Sabrina: "Man, it's been
forever since I've seen Kyouko!"
*Remembers that she last saw Kyouko
yesterday*
Or how about:
"Hey Mami, are you over your plethora of psychological issues yet?"
"I was literally a broken, sobbing wreck that couldn't even stand being in a different room from you
two days ago."
"Damn it! I can't let that stand! I'll figure out
some way to make you all better before the
next two days are up, don't you worry!"
Or even:
"So hey Immaboutto drop some bombs here, best make sure I social-fu this like a mast--hey I wonder if I could use grief to make Mami's hair look even more outrageous than it already is...come to think of it, I could probably pull off an Einstein look myself...and I wonder what I could do with Homura's hair!"
"...Sabrina?"
"Hm? Oh! Sorry, lost my train of thought. Anyway, the long and short of it is that magic is real, magical girls are duped into living an extremely dangerous and hellish lifestyle in exchange for one wish, and white bunnycat aliens should be shot or pulverized on sight. Alright, now let's go magically heal Kyousuke's untreatable injury!"