Average PVP guilds and average Raid guilds. I had chars in multiple guilds. There was no high pressure, at least not after Burning Crusade, I quit early in to WOTLK and came back in to MOP but I no longer felt that drive to be first at anything and in my opinion gear was kind of busted.

Although I had very few girls in the guild, most raids or even pvp had 0 girls. The one girl that sometimes joined was a RL friend of mine. Strangely enough I had more girl players in Vanilla then I did in Legion. I quit for good in BFA, I did not even reach max level with a character.

Of course this is just my own experience so clearly is not proof of anything. However the stats may be skewed, I never remember being in a survey so it may be affected by whom they interview and then not take in to account things like hours played or interest in playing. Just because you tried it once because your boyfriend was in to it does not mean you are an active player. I don't even know how you go about making such survey, how do you find the players to interview and select them in an arbitrary fashion?

In ancient times I remember that Blizz said something like 20-25% of PCs are female but that is meaningless since a lot of guys have female characters so the 23% girl players is very sketchy.