6700 guilds have 1 boss in T15 down. Apparently that is pretty much every guild that attempted to raid on the day of the patch (and the day after). However by the end of T14 almost 40 000 guilds raided normal. So 34 000 guilds haven't even started or not submitted info to wowprogress or whatever.
2200 guilds have killed 2 bosses on normal (among them Horidon). That is 35% of the guilds who went and tested this new tier. Too few? Overtuned? Just right?
It trickles out from there to 2 guilds having done a full clear. Make with those numbers what you want, everybody.