The cop that taught our intermediate tactical self defense class observed that while being able to get to your concealed weapon quickly is important, in reality about 90% of the time your first move will be to seek cover before drawing. Those times that extra couple of seconds to get the gun out are not nearly as critical.
It was quite enlightening to see what happens to your accuracy when trying to quickly draw and shoot compared to simply shooting. Our drill measured draw/shoot time and then added penalty time as accuracy decreased. Fast draw without a good center mass hit isn’t worth much.
I have found that by and large the key to winning a gun battle, or avoiding one in the first place, is to be the first to decide that we ARE going to have a gun fight. That takes the OOD out of the OODA loop (Observe, Orient, Decide, Act). It also let’s you cheat a good bit on the act part, like identifying cover, positioning, and having the weapon gripped and at the ready.