arya from the old crossroad inn arriving at winterfell in episode 5, shouldnt the nights king coming from hardhome already reached the wall?

Well the Night King is the slowest Villian in History. Winter has been coming for 6 seasons

slijdicjsa

i mean king robert took a month goin to winterfell....hardhome (north of the wall, where jon snow and the wildlings was overran by the army of the dead) to the east watch is just a quarter of a distance compared to kings landing goin to winterfell, hardhome is just days away from castle black...arya came from the old crossroad inn just north of kings landing....with arya arriving at winterfell means a month had already passed....is the nights king lost in the woods north of the wall? whats taking him so long?

the time line is releveant to know if westeros will be prepared... once the dead reach the wall and westeros army aint there...they are screwed, the wall is the only place they have advantage...if the nights king pass the wall....all the dead on the ground will be added to his army...imagine all the crypts and the graveyards they pass southward...all the dead under the ground....rising up....gee, i dont think even 3 dragons will be enough to burn an army as vast as this....they will drain themselves breathing as much fire as they could and they wont even make a scratch...