just coming from a guy who’s pugged his way to 14 over the course of 4-5 months, I won most of my pug games and when I landed in partials against full premades, won most of those too. I also wana say ive beaten alliance premades with a full pug group a number of times now, sometimes with no healers. Its no secret the alliance is bad at pvp. Take the fact that most pve servers are alliance dominant and pvp for horde.
so youre just making statistical claims based entirely off of your personal experience