I can totally vouch for this. My 5,3 MBP only got about 4 hours max when brand new as long as I was running OS X and had the power-saving video mode selected. R

I can totally vouch for this. My 5,3 MBP only got about 4 hours max when brand new as long as I was running OS X and had the power-saving video mode selected. Running Debian, I usually see around 2 hours if I'm lucky.