Well, the percentages are the percentages of the total amount of players on each realm, so what I did was do a quick rundown of the average faction split on all EU servers.
But I’ll add the player counts this time instead and base it on WCP instead of IFP, and just convert it to percentages to see how that turns out.
UPDATE:
Alright, so I’ve now done this (laborious af) and it ended up as 392011 Horde characters, and 371346 Alliance characters.
Which makes it 48.65% Alliance and 51.35% Horde in EU, based on https://wowclassicpopulation.com/overview and I only counted the same server list as the one under the Europe tab over at IFP, so it can be used for comparison.
Keep in mind though, these numbers from WCP doesn’t exclude alts so take it with a grain of salt, but it’s the closest you can get to the true numbers because Blizzard hasn’t publicized the real population figures.
So my point still stands. The population split is close to equal.
(PS:
If you check the last 14 days filter in the WCP link, then it shows some pretty funny splits probably because so few got the addon that provides the information. I used unfiltered as the basis for this post.)