The longer of a draw I take, the less vapor I can blow out, unless I do the double inhale such as blowing it out the nostrils while inhaling another draw. I can do it that way all day, if I could handle all that vaping lol. But, in normal vape sessions, the first 1-3 seconds of vapor is the most prominent for me. Yes, I do hit the button before touching lips, but the amount of time of doing so depends upon the wrap and the mod volts.
I don't know why it is, but the longer I toke, the less vapor I manage to exhale. It seems to dissapate before my very tastebuds. Maybe my saliva is too wet or too dry, or something lol. Here.. wanna see?