Fieari: Not sure how they did their testing, but I have seen live demonstrations where someone has caught an arrow from a few yards away. That said, totally unrealistic in combat. More realistic: soldiers cutting aside arrows with a flick of their sword. The arrow drops to the ground, harmlessly.
The important thing about DF is that it's real life plus fantasy. This means real world mechanics with fantasy elements such as fantastic creatures, multiple sentient humanoid species, magic, and who-knows-what-else.
Let me put this in perspective. I'm a physics major. Most movies, when they come to physics, are about as accurate as the time cube. They pull out an "IT'S PHYSICS!" explanation, or none at all, to explain why plot device X works just so. And this always. Drives. Me. Crazy.
Some movies are much better about it, though. For example, Timeline. It breaks SO many laws of physics, but they're all obscured--for example, mass is not conserved with a time machine, but that requires a more in-depth explanation than anyone would enjoyably listen to, so I'm OK with that. Then there's the whole "earth's hurtling around the sun which is hurtling around a black hole" bit. Same deal.
Basically, I like my treatment of physics in fictional works like I like my women: with enough realism or explanation of the funny bits to let me go on without a sense of indignation, but not so much that it becomes a physics lecture. Maybe I like my women a bit differently, actually.
I'd be fine with artifacts of turn-the-fuck-around, but just saying "Yeah, he can deflect arrows right back at the bow borgle because he's JUST THAT GOOD," doesn't cut it.