I hope you got your answer. Yes its takes some time for editing and approval of resources. If they are well optimized and well written. They can be approved ver quicly almost as soon as an Editor sees them. Because their work losd is reduced heavily, which they have to put otherwise in optimizing the article.
So depending on many factors like number of pending resources, to what extent they need to be edited it takes normally 2-3 days as said by our webmaster and Subhajit above.