1/2 way through backing up my GMail. First, it takes days. Second, my 40k+ emails = 22 a day.

46K emails since the start of 2006 = around 22 emails a day, taking out deletions, but leaving in a bunch of junk I just never threw out. I think this is below average, even taking into account that I didn't send as much email in 2006 as I do today.