I set up a queue with a shared mailbox for the incoming email address. It seemed to take 3-5 minutes from when I sent the email to when it showed up in the queue, sometimes longer. Then I set things up so it auto-creates a case and associates the email activity with the case - it's still taking around 5 minutes before the email shows up on the Case's activity feed. Is this expected behavior? Is there anyway to speed things up?