I stand corrected then. But they can still distribute a preprint according to their terms: http://www.elsevier.com/wps/find/authorsview.authors/rights

the right to post a pre-print version of the journal article on Internet websites including electronic pre-print servers, and to retain indefinitely such version on such servers or sites for scholarly purposes (with some exceptions such as The Lancet and Cell Press. See also our information on electronic preprints for a more detailed discussion on these points)*

Unfortunately, that excludes some of their best publications.