Darkslayer, you should probably realize that real-life iaido, while fast, isn't nearly as powerful or quick as people like to think it is because of anime and games.
Iaido isn't necessarily a discipline for "quick, unseen strikes," it's a discipline for attacking while drawing the weapon, to protect the kenshi from dangers present from drawing a weapon normally and within vulnerable states (like sitting), and keeping the drawing of a weapon hidden. The last bit is probably as close as it comes to fictional iaido, because it's trying to attack without drawing attention to the fact that your weapon is out, and you intend to attack at all. It's really fancy, and beautiful to watch someone go through the katas, but it's nothing like how it's been glorified.
Iaido is a discipline specifically like that. Once the blade leaves the sheath though, it's used in a lot of ways just like a normal katana.
I really don't think any "from the sheath" strikes account for being the kind that are coupled with the strength to slice through a body. Yes, katana are very sharp, and have been known to cut cleanly through human-like targets, but those are notably almost always two-handed strikes.
Plus, while Vergil's Iaido is still very blindingly fast and whatnot, there's a great disconnect we see in his speed, because he could really even be attacking with the scabbard a lot faster than he does. It's the same weird speed variation we see with Dante using Rebellion, between his normal combos and his Million Stabs.
Iaido isn't necessarily a discipline for "quick, unseen strikes," it's a discipline for attacking while drawing the weapon, to protect the kenshi from dangers present from drawing a weapon normally and within vulnerable states (like sitting), and keeping the drawing of a weapon hidden. The last bit is probably as close as it comes to fictional iaido, because it's trying to attack without drawing attention to the fact that your weapon is out, and you intend to attack at all. It's really fancy, and beautiful to watch someone go through the katas, but it's nothing like how it's been glorified.
Iaido is a discipline specifically like that. Once the blade leaves the sheath though, it's used in a lot of ways just like a normal katana.
I really don't think any "from the sheath" strikes account for being the kind that are coupled with the strength to slice through a body. Yes, katana are very sharp, and have been known to cut cleanly through human-like targets, but those are notably almost always two-handed strikes.
Plus, while Vergil's Iaido is still very blindingly fast and whatnot, there's a great disconnect we see in his speed, because he could really even be attacking with the scabbard a lot faster than he does. It's the same weird speed variation we see with Dante using Rebellion, between his normal combos and his Million Stabs.