I asked on Twitter:
How did a TIME magazine article end up indexed by PubMed as a scientific paper? http://bit.ly/NtClC and http://bit.ly/NB9F2
And here are the comments and answers:
FutureDocs I have wondered that too...had seen @TIME in Medline before
bmljenny Since 1998 PubMed has selectively indexed a number of consumer mags. They don't consider them scientific.
giustini How did TIME article get indexed in PubMed? http://bit.ly/NtClC Ves, these are 'out of scope', only in PubMed, not MEDLINE
giustini ...and, as pointed out, some consumer health cites are 'out of scope' AND indexed in MEDLINE
Thanks all for the replies and helping me out with this question.