Okay... I am really surprised that nobody has even noticed this.
Firstly, does anyone here still remember when Kaiba, Naruto, and Sakura (and their friends) were hunting Sasuke, and the trail vanished? They said then that "teleportation is just really fast movement".
Following from that, if anyone has enough chakra, and can use it quickly enough, then anyone can do the FTG technique without seals, or kunai, etc.
It's just speed, that's all it is.
Finally, FTG is not a space-time jutsu like a few others, it just allows you to move faster by giving you a spot to know exactly where to go, even if you cannot directly see it, by using kunai or seals.
Therefore, what Naruto did in this chapter is simply a teleportation technique, which is essentially extremespeed movement. When (whats his name/mental blank) said "He's not quite at the 4th's level" he meant that he was more powerful than Minato, but couldn't utilize this power yet, so Minato still surpasses him so far.
As soon as Naruto has some time to practice, Madar, Sasuke, and the other enemies he has yet to face (I have no doubt that there would be more), will have no chance. Using the kyuubi's chakra, he can go and learn extra chakra control. If he does... he could do the rasen shuriken without clones, and create clones without wasting chakra... hell, with the fox's chakra, which is thousands of times more powerful than his, he could create enough clones to cover the entire Earth.
I heard several people pondering whether or not Naruto will combine Sage Mode and Kyuubi/SO6P mode. THis should be friggin' EPIC if he does... because the Sage mode balances chakra and natural energy with physical energy. Since the Kyuubi's chakra could potentially augment his physical energy as well as his own chakra, he could gather infinite amounts of natural energy without being turned into a frog statue. Nobody could stand up to him. EVER.
Naruto has limitless power under his control. Tread carefully, Sasuke, Madara, and all the rest of you fools.