Obviously, there are people who applied before June 1, 2003, whose cases have not been adjudicated. However, that does not mean that processing dates are entirely meaningless. For one, we saw a remarkable increase of activity with June -- September, 2003, cases around the time they moved the processing date to June 1, 2003.
I read somewhere that these dates were never meant to indicate that all the cases filed before have been adjudicated. I am not sure what the exact criteria for moving dates are, but there are such criteria.