Lexar says Windows formatting better than in 7D!!(?)

new 7D; new Lexar 16GB Platinum II 80x CF card; shoot RAW
have always formatted in camera;
of first 400 images, DPP tells me 3 are corrupt;
their order is irregular & seems unpredictable;

Lexar tech tells me to solve problem, format in Window because it formats "more efficiently" than camera & will delete cause of corruption

THIS CONTRADICTS all I have ever read about formatting only in camera...?
Or maybe he meant format in Window just once to solve problem?

Any advice or related reports appreciated.
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Regards