People like to shit on reddit a lot here, but both the submission and the discussion over at /r/science [1] contains much more substance than discussion here. They link to the actual paper as well, which contains more details, such as efficiency.
Maybe part of the problem is that specific subreddits like that have specific rules that enforce this:
"Editorialized or biased headlines will be politely requested to resubmit.
Submitters of summarized primary research that do not contain citations in the article are highly encouraged to include links to the original, peer reviewed sources in the comments. This is to allow interested redditors with expertise to fact check the summary author.
Please don't submit breaking stories that have already been submitted from different sources.
Submissions that are not directly about scientific research (e.g., science education, science policy, educational videos, etc.) need to be non-editorialized and substantive."
[1] http://www.reddit.com/r/science/comments/i6pfi/