| On an individual level sure.  But on the matter of trends and tendencies, it's not hard to look at numbers like "average debt:income ratio for household income of $250,000" and make some generalizations about the average $250K earner.  It'll never apply to everyone in the category, but it can still be an interesting comparison point. 
				__________________'He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me.' 
-TJ
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