Every megaparsec of distance leads to an increase in relative speed of 70 km/s. A parsec is about 3.26 lightyears - so a megaparsec is 3.26 million light years.
Dividing 12 billion by 3.26 million gives us ~3680 megaparsecs of distance between us. Multiplied by 70 km/sec, we get a speed of 257,000 km / sec or 86% of the speed of light! (300,000 km /sec)
More mindblowingly, there are galaxies that we can see light of that always have been receding away from us faster than c.
More details here: http://curious.astro.cornell.edu/physics/104-the-universe/co...
"Expanding Confusion: common misconceptions of cosmological horizons and the superluminal expansion of the Universe"
It's not that much farther, 13.97 billion. (13.97 billion / 3.26 million * 70 = ~300km/sec).
But looking at the other posters comments, we could be moving away from someone at 2c, because if we were both moving at the speed of light in opposite directions the relative separation speed would be 2c, even though each is only moving at c in a different direction from an observer. Is that right? so maybe it's ~28 billion.
I am getting a sense that the author is implying that there was not enough time for that black hole to form in this "radio galaxy", which seems to imply our "age of the universe" theories might be off. I guess that's exciting on a macro, abstract level.