With today's technology it doesn't matter. You can shoot with the gun sideways, upside down, at an angle whatever, and you can still get a right side up view of the target, without looking through a scope. Hold it at your hip, over your head, between your legs, doing a hand stand, anything. It depends on the technology and scope your using. Well and how much money you have.
So, technically, you can shoot a gun from ANY position, and have it be just as accurate if not more accurate than holding a gun from a traditional stance. Technology changes everything. Buut that is a long way's away from the avg consumer budget. So, if your talking about which is the most accurate way you personally can shoot... it's traditional. Wait a couple years and that will change. Military wise, it's about to the point these scopes have the go for mass production. Basically you can blind fire with the same accuracy as a traditional stance, without physically looking through any sights.
It's called a HUD. No more need for scopes. The HUD will take over and very quick, just as cell phones have taken over the communication arena.
But then again, I'm speaking technically. Once again, the tech is so new you will pay more than a pretty penny, but answering the topic question... my answer is fact. (Check future weapons [I think season 1 or 2 for the info]. It's no longer just in early prototyping. It's finalized. Now it's just waiting for the military contract, which will be followed by civilian use. Heck you can buy one now if your wallet is deep enough.
And to correct the "drive by" comment... no, it's now so you won't get shot. May seem "hollywood" but this is real tech, and it's here NOW. Funny how the whole "gangster" thing has turned real, but with major benefits from a tactical standpoint. No longer do you need to expose yourself, you look into your hud to see and fire with any finger from any position, with accuracy that rivals the traditional standpoints.
To add : no this was not the episode with that blind fire system that holds the pistol. This was the scope mounted to an m4 with the operator using a HUD display to look through, not some crappy pistol system mounted to an angle/foldable capable LCD included gun system. (that was lame... as who would use a glock in CQB situations where someone with an AK or such would be hiding.
O and on that mythbuster episode they used traditional "bullets". There are bullets that exist that are more like rockets that can change path, but thinking civilian use, this probably won't be a reality for many many years unlike the HUD system I mentioned. Plus I doubt any gov / state would allow basically a homing rocket type round in a hand weapon, or big weapon regardless. Buuuut the HUD system is legal, and will be legal. Can't ban scopes, but you can ban round types.
(to add, the pistol system was called the Israli Corner Shot. The system I referred to with the HUD was called the "Aimfinder" made by IDS, which aired in Season 3 of future weapons, episode 10 called Killzone). Man, look at that update speed. I shot through 20+ episodes, found the episode, season, sight name, company, all within what 5 min of my original post. ACE! - try finding that info on google. LOL well besides one post on a forum mentioning the same thing but they said season 3 episode 9... bah, I have the dvd's and it's season 3 episode 10. ACE! I'd post a pic of the system if I could find one. Good luck digging info on it quite yet as there are some serious "caps" on information out there. I'd take a screenshot and post it but the forum rules say not to sooooo get netflix, or buy the dvds!
To add : It is possible to curve a bullet. All bullets curve... downwards HAHA! (welll, unless there is a crazy cross wind, then they curve sideways. IE windage settings on a scope. So technically the answer to "can a bullet curve"... is yes, they do on every single shot... just not intentionally, unless you are a godsend with reading wind, in which case it's "compensating" for the wind, not curving it intentionally like the "magic bullet" did that killed kennedy.
Now, I'm wondering if you were in one of those crazy spinning UFO type carnival rides where your pressed against the outside of the ride, if you shot a round, would it curve or hit the guy in front of you, or next to him, or would it just seize up in a black hole ordeal and not go anywhere
Scratching head! lol (the visual alone on that is great!) Hurrah for a what 3rd or 4th edit. I call ninja!