Snapchat should take seconds to show you a sent, received, or delivered icon on your Snap or chat. Your message/post goes from the app to the Snapchat server, producing the sent status. The Snapchat server acknowledges the Snap, providing you with the received icon. It sends the Snap to the recipient, and once the app recognizes it, you see the delivered icon. Opening a Snap or chat is another thing, which depends on activities by the recipient, such as seeing the new Snap or even opening the app. Many things can delay someone opening a Snap, and you should bear that in mind when sending them. People will open their messages quickly when they see them but won't always be able to do that. Be patient, and don't get anxious when they don't. Our lives are getting steadily busier, so patience is sometimes necessary when waiting for a reply.