I believe as young children, it's about the same. I remember from my childhood just as many wildly ticklish boys as girls. But then as kids become teens, then adults... ticklishness is usually seen as cute in women, versus submissive for men, and therefore men tend lose it more often. As covered in other threads, the mind is a key part of being ticklish, and truly not wanting to react to it is definitely a component, especially over time.
On another note, a pet peeve of mine is people who repeatedly distinguish individual anecdotes from statistical averages -- like it's some win for social justice to point out that exceptions exist. "You said men are taller than women -- well, not every man is taller than every woman." Thanks, social justice warrior for lowering the intelligence of the conversation. 🙂