Very similar here, although it's decreasing as I age. In my twenties I needed 9.5-10 hours per night to feel optimally sharp and focused; 10 years later my requirement seems to be down around 9 hours.

Although, like most hot-air-pushers in these sleep threads, I never tried objective measurements of performance under different circumstances. Maybe I just _feel_ like shit, but actually perform well, with less than 9 hours of sleep.