I recall it being something like 3-4 seconds.
Personally, I think too much emphasis is put on how fast you can draw and shoot. Yes, you need to be able to access and shoot without being a bumblefingers. But, what you really should be doing, if possible is getting out of the way of an attacker, or ducking for cover.
Also, when I'm at an ATM Machine, (aside from constantly looking around and behind me), I cheat - I sometimes keep my lefthand on my pistol while my right hand is working the ATM machine. I'm good enough with my non-dominant left hand, and I do practice shooting left handed.
FWIW, if you haven't noticed, I'm scared of ATM machines.