I have to say, no one has openly said/proven that they have a global on every mob, and I don't think anyone has either.
You are right on some aspects. As far as the "Quest" that I go for, its the same as the one Rayne goes for also, which is solo global on every mob, team global not counted. In that sense its more hardcore than globalling every mob. You could take out the 4 small birds to change things to only aggroing mobs, but I like how almost unattainable the quest is, bit like a player starting in 2008 going for all natural/no chipping Killstrike from 0 skills. I hope to one day, but it will take a long while ^^
There are many threads about with regards to global, all but two have got things like "mob too hard, skipping" or "mob too rare" etc. I do have an asteris on my list, but that's to differentiate between event only mobs, and mobs that are available all the time to the average hunter.
So Rayne and I go for the same hardcore quest and I get really excited to see Rayne get a new mob because its almost like we push each other on more. With regards to a quest, rather than "all mob" some mobs aren't available all the time, some just once a year, so all mob is not a viable thing for everyone to go for should they choose.
But Rayne and I do the closest thing to it I think. Saying that, I support all quests like this, Dannielleyourmom has my full backing and both Rayne and I link to their thread on ours, as its great to share achievements. I also have a friend who does a similar quest, although currently his includes some rarer mobs that he has team only global on... but... he DOES have a solo Turp hof =P so he has 1/4 of the 4 hardest birds already ^^ anything is possible.
PLEASE PLEASE PLEASE add some rarer mobs to WoF like the 4 birdies! (Even the 3 flying insects would be good!)