thats not quite what the article says. It does however say that it was able to transfer "an average rate of 925Mbps compared with 266Mbps on the same routes using ordinary TCP". Now can 56k modems transfer 266mbps? No not quite there yet. But if we look at the numbers 925/266=~3.5 then we can take 56*3.5=196, so with this technology we can hope for 196kbps on a regular line, in the same configuration as a 56kb modem would be setup, that is if your isp will give it to you that fast. It sure would be nice if it does happen.
hope this clears up some things.