G-V and capt bloggs.... unlike you I'm not stupid enough to go through CB's. I'm referrring to those pilots in clear air who chose to slow up from .82 or 81 to .8 and truly believe they are improving the ride. Totally unprovable, and highly unlikely. Just sheep!
Even in severe turbulence the Airbus QRH only says 'CONSIDER' reducing to Turbulence penetration speed as specified in the table. It isnt even mandatory. Why?