Yet, not only have measures of US worker productivity shown this to be untrue (right?), but, check this out:--
B.]
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http://news.yahoo.com/s/hsn/20080608/hl_hsn/sleepanecessitynotaluxury
Sleep: A Necessity, Not a Luxury
By Dennis Thompson HealthDay Reporter Sun Jun 8, 7:01 PM ET
[...]
Before Thomas Edison invented the light bulb in 1880, people slept an average of 10 hours a night. These days, Americans average 6.9 hours of sleep on weeknights and 7.5 hours a night on weekends, according to the National Sleep Foundation.
[...]