Not really. Most of it is lack of proper power management in the drivers, especially graphic drivers. Work is ongoing, things will improve. In a few years.

Not really. Most of it is lack of proper power management in the drivers, especially graphic drivers. Work is ongoing, things will improve. In a few years. I have only about 2--2.5 hours of battery life in my T61 under Ubuntu (standard 6-cell battery, 3 years old). Luckily that's sufficient for my needs.