An Observation
I tested lots of coils today, using a 510 connector and mod box. It's just as much a burn off as it checking on coil function. What I noticed is it will achieve a state of soft, almost translucent glowing red. This is very different from super hot cherry red (IE: cleaning a screen with a butane torch). It takes about 3 to 5 seconds, depending on battery life (even in a regulated mod box) to stabilize at what appears to be max heat. I haven't tested in the dark, but it would be kinda cool to see the coil glow in the dark.
I thought, let's see what happens. I take my current DD, my only LB right now, and just hit the button, no pull, loaded stem in. I totally don't want anyone to do this ever. I held for 20 seconds and the body isn't that hot. The herb chamber is barely warm. I'm going to do a test really soon where I just tape the switch on and see how long it takes to burn up. I'll be standing by with an extinguisher, eye protection, outdoors. Very little heat leaves the coil unless your draw it with your breath. And you get quickly zoned in to the optimal draw rate.
No real drawback for a bit longer button depression, other than drain on battery. With a full battery, about .08 nicely loaded, I hit the button for 5 seconds before I took put my lips to the stem. I've gotten really good timing with draw speed, pressure, button lately, so no charring ever. I was curious to see what happens with this short pre heat. The hits were fuller, smoother, I could feel the expansion of the air in the air path.
I truly believe that the higher the volume of heat to more evenly saturate, the smoother the potential for the hit. If you draw before the coil tops out, you might be on the edge of running out of heat, versus dealing with a very stable, therefore reliable, long lasting, heat source. This might also forestall stirring, but can be used in combination with a stir. It definitely allows you to get more out of a battery (use it down lower).
I like that I don't have to preheat, but if you're a taste chaser, and you are looking to take LB as far as possible, it's something you might try. It requires even better timing, as you don't wanna overdraw on this maxed out coil, or it will have the reverse effect.
I'm always looking for smooth taste without wispy. It's really a bunch of little things.