I think trying to set any type of precedent regarding an individual's sex and ticklishness is prone to errors and misleading information.
While I don't have many tickling experiences in my life, I have run into a handful of women who are not ticklish at all, while I have observed other males who shriek and curl up into a little ball over the slightest poke to the sides.
My female best friend has also tried to tickle me several times in the past, and she can be very rough/aggressive with it to the point where it actually hurts. She thinks she's tickling me, but she's digging her fingers into my ribcage causing me pain.
I realize this is only one small example, but it illustrates the fact that we can't really make tickling assumptions based off of one's biological sex.
I will say that I feel like women are more likely to be tickled than men by other women and men. I feel that because society generally holds, or used to hold, a tough, domineering, in control view for men, that they are less likely to be tickled and people are less likely to tickle them, unless for comedic or silly purposes.
Obviously that isn't true in this community, but one could also argue that is one of the many reasons this community exists.