Yea i agree with what you say about the 1 minute of talk is more vital then the rest, if you show the right subconcious signs of an alpha male.
i used to have a friend who told me he would “ping” a girl, and in few minutes of very sophisticated social calibration she would decide if to sleep with him in the spot , women are 10x more intuitive about status and inner qualities then us.
about the stammering part, i think it dependes on the situation or the girl, there were few girls i known who stammered or hesitated a LOT around me, and it for sure wasnt because i was alpha, i was just socailly awkward as … so they mirrored my behaviour.
btw, i can say that psitu really help with feeling comfortable around women you are into, for me it really did a big improvement, but i can’t say its this program alone(probably a few other helped too)