You need something for the magnets to push against, or you end up with the 4-chan 'problem Einstein?' image macro situation. You can't fly by trying to climb up your own leg.
Also, they don't affect gravity or mass. An object levitated by a magnet has exactly the same mass and has exactly the same force of gravity acting on it.
To say that no research has been done is one thing, but to make a statement to say that it is impossible for humans to expand their travel beyond primitave fuel burning rockets or even solar wind sails is just damn right narrow minded.
The Quantum Gravity theory is not a closed and finished book, it is updated through human technological advancement.
This isn't some tweak to existing theories, or a new theory to explain some repeatable, observed effects, it's a claim by a not-particularly-reputable website that magnetic fields - a relatively well-understood subject - can somehow affect gravity, a subject not well understood mainly due to the fact that it *doesn't* observably affect other effects (such as electromagnesim ) apart from mass making it so bloody hard to pull apart fundamentally.
Sucessful reasearch? Peer-reviewed research leading to the explanation and reproduction of similar effects and vehicle types? Why aren't the US Air Force raining fire down from the sky over Afghanistan in 100-metre, Mach 50 capable flying-saucers?
Which just explains how adding a mass term to caclulations allows the movement of electrons in a solid to be explained using Newtonian Physics
Quantum gravity is a possible way of investigating and explaining gravity on a quantum level, it's not a way of building a magical antigravity device. That e-field article mentions huge amounts of energy stored in the earth's magnetic field, but that figure of 7000MJ for the potential electrical energy stored in the atmosphere, when spread out over the earth's surface (5.1*10^14 square m) becomes roughly 3.5 milliJoules per square metre. And that's assuming your device is 100% efficient.
By far the strongest magnetic field experienced on earth is that of the Earth itself. It's just about strong enough to move a compass needle if it's held very still and in such a way to be almost frictionless.
Assuming you do have some magical gravity-manipulating propulsion source that can levitate and accelerate these things (for a quoted continuous 55 hours) it still doesn't explain how something with a cross-section of over 1000 square metres can plough through the lower atmosphere at 57 times the speed of sound. There's a reason meteors leave a flaming trail behind them.
Well, you are correct, but from what you see, the gravity 'speed' is reduced by the electro magnetism. An object suspended by electro magnetism will appear to be immune to the effects of gravity.
B.S, your source? There are lots of scientists down there most of the year + half the world has laid claim to a slice of it. I never knew it was so popular.
In much the same way as an object suspended by hot air will appear to be immune to the effects of gravity. The only differences is upon what the reaction force is acting. In the case of the hot air ballon, it's the atmosphere. In the case of a magnet, it's another magnet of reverse polarity. The latter is not very practical for transportation unless you have a big long track that is literally a magnet (i.e. maglev trains).
Mag-lev trains. Where the track is effectively a giant magnet, along with the car, thus creating magnetic repulsion and then used to create propulsion.