If anyone knew for a fact that the pilot had been passed on, why would we remain silent? It wouldn't be good news, but it would be news we would report just the same.
According to a person who would certainly appear to work for the WB and who posts on the General board on their official forum, the DS pilot was only viewed on Wednesday. So, unless the pilot turned out to be so incredibly awful that they were completely disappointed with it, it seems unlikely they would have made any decison so quickly. And for what it's worth, the same person posted on Friday that absolutely nothing has been decided regarding DS.