Boomer: I for one would appreciate a chivalrous word from a male co-passenger on my behalf to a FA if I were getting sub-par attention. Of course, many of my gender would likely bite your head off for the gesture, no matter how sincere you intention. I sometimes pity men for the double bind women put them through when they attempt to be gentlemanly: ****ed if they do, ****ed if they don't.
My experience in FC has been limited to travel this past year, (and a long time ago when I was a little girl and my dad was an air traffic controller when I got to fly FC A LOT). I have noticed differences in FA attentiveness but not based on gender or attire. The levels of service seem to be a function of the airline: Delta's has been tops; United's sucks.
Samantha