Earlier quoted context omitted.
The new rMBP is about five hours if you don't touch it at all. under 4 hours if used for working. It is a step down from my previous 2012 model which is a damn shame.
There’s something wrong with your machine. I can squeeze a full days’ work out of it if I need to, and Apple claim up to 10 hours.
No you can't. Do you think you can just lie openly about this? The only way to make this statement true is that you don't do any actual work on your laptop.