Very often a user doesn't know the total number of distinct values for a variable. It would be quite helpful if the same is shown somewhere (as was in HBX - in the last row where the total metrics were shown). For example - number of distict Natural Search Keywords that received at least one response - quite important a metric for SEO health check. Also helps in expecting the number of rows while 'Saving a report'. Currently I end up selecting the maximum possible number (50000 for csv and so on) but I have no clue what the actual number is like.