Ben at The Design Conspiracy pointed me at this article which confirmed something I'd always suspected - successful people get up earlier than the rest of us. It looks at the work habits of the usual corporate success suspects and reveals the time they're getting up:
Carlos Ghosn - Nissan/Renault - 6
Howard Schultz - Starbucks - 5
Bill Gross - Pimco - 4.30
A.G. Lafley - P&G - 5
Amy W. Schulman - DLA Piper Rudnick Gray Cary - 5
Hank Paulson - Goldman Sachs - 5.30