Kedrosky has a post up that says 1 in 18 households in the US are now "millionaires".
It recalls British publishing billionaire Felix Dennis' new classification of wealth:
Total assets | |
£1m-£2m | The comfortable poor |
£5m-£15m | The comfortably wealthy |
£40m-£75m | The comfortably rich |
Beyond that come the super rich and the filthy rich...
Note that figures are in british pounds, so it's roughly $2-4M in USD to be comfortably poor.