I always end up waiting a minimum of two minutes, and as long a 30+ minutes, for ProSeries to generate an electronic filing status history.  The EF Center view, in general, is always slow, sluggish, and often freezes.  I have had this issue for all tax years.  I would assume it is because our database is so large (3063 returns), but I often wait several minutes for only one electronic filing status history to generate.