At least it doesn't give away everything... but I think a lot of people probably still have it DVR'ed and are still at work when this will come out. I wouldn't say yes or no to deleting it, because there's other worse spoilers already on the site.
My personal rule of thumb (on FB anyways since I haven't posted any here yet) is to wait 2-3 days after a show airs before talking about it. Mostly because I know a lot of my FB friends DVR shows. I'm not sure what the majority of the community here does.