We're going to publish more Linux benchmarks as well. We have s0ix noted (7 days), and we're trying to make some more repeatable productivity-oriented workflows for Linux to use. We expect that Phoronix will publish some pretty thorough power efficiency tests too. We'll certainly be providing them with review hardware.

Always depends on your configuration but I've not had issues with arch or fedora getting comparable battery life to Windows in a long time.