As a suggestion: keep the current information shown on the feed as it is right now, but show a more precise time on the single post activity. I think most of the times we would not be interested in the exact time a post was published, but only in some of them or even very ocasionally. Showing only in the post view would not degrade performance and keep the feed cleaned.
RE: Shedding Transparency on Sustainability Projects. (+ Free STEEM)