Remember, most of us with 2-3-4 of the same gender may not be coming into a sway with 50-50. So even if something gets 50-50, it may still be swaying. For example, if you start off with 70% chances of a girl, and get to 50% chances, that's a HUGE blue sway even though it may not be obvious just from looking at people who used any particular tactic.
After getting 4 boys over 21 years I figured my odds were NOT 50-50 LOL so I would tell myself "I'll sway to get to 50-50 and then I'll take the flip of the coin at that point!" Good luck and blue dust coming at ya!