I must admit I didn't read the article only the research paper and I didn't have any issue with it. But if the article says what pp's say it says I don't think I'd agree. I went straight to the research.
@A-Squared your point about improving wakefulness comes back to the stats I mentioned earlier - the 15/15/70. Of the 70% those babies can improve with assistance from parents (what that assistance is will vary depending on the parents own views) but will still have bad nights. And will regress. They can go from being terrible to not so terrible. Or even better. But they are unlikely to be perfect sleepers.
That's my take on it anyway.