Actually there are plenty of people who can draw and fire under a second. It was proved by demonstration back in the 1960s that some people could draw and fire, while facing an armed perp with hammer cocked and gun pointed, before the perp could fire his/her weapon. Saw it done more than once back in the day.
Worlds Fastest Shooter — 8 rounds in 1 second
http://www.youtube.com/watch?v=7DpCellB_UQ