It's an exaggeration of the truth, I've had to download over 20Gbs of addons to play in a murder server before, and I swear to god, like ~90% of it was anime girl models. This wouldn't bother me too much if it was limited to a few niche servers, but it feels the majority of g-mod servers these days require you to download a bunch of anime player models. If you own the game you should test it out and see it for yourself, I guarantee you'll stumble upon it in a few tries at most.