On Wednesday, 3 December 2014 at 23:26:42 UTC, Vladimir Panteleev
The existing search result ratings for DSource are because of
all the existing links to it, and not so much because of the
content on DSource.
The site owner has some control using webmaster tools:
Btw, downloads.dlang.org should specify robots.txt and
dlang.org/downloads.html should consider specifying
noindex/nofollow on links.