I would find it difficult to hit a target with my 870 12 gauge from the hip at 25 yards, let alone a rifle or pistol. And yes, I have tried (Mostly being an idiot at the range seeing how fast I could work the action). The closest range I would EVER try and hipshoot anything (which for me is really 0) would be 5 yards. It's really not as simple as it seems, at least in my experience. Seeing as it really doesn't take that long to shoulder a rifle, I think your much better off taking the extra half a second to do so rather than risk missing and having to rebolt. I think ROOST had hip-shooting inaccuracy set up pretty damn good.
And as a side note, 25 yards is probably a lot farther than most would think. Go get a yard stick and line it up 25 times, what you see might surprise you.