"Shrook's sophisticated Distributed Checking mechanism means you see new items long before users of any other news reader. Simply put, each time one copy of Shrook finds a new item, it tells the central server, which tells all of the other copies, including yours. The average time between an item being posted and appearing in Shrook is just five minutes, all without placing undue burden on publishers. Other programs have you wait up to an hour."
Source : evHead