In real life, no, it travels exactly at the speed of light because light is electromagnetic radiation and is the force carrier of electromagnetism.
In US2, it probably doesn't have a speed limit, like gravity, especially because magnetism isn't as developed as gravity yet and may not ever be as I'm sure they'll make the gravity system better and more like relativistic gravity (without actually doing the relativistic calculations, that is. I'm sure the devs don't want a bunch of people's computers to melt because of them)