Assuming the majority of those 8k numbers are for Wii U, comparing to first week sales for BO 2 on Wii U (2.362), Ghosts did better.
With UK sales for BO2 being about a fifth of all european sales (9,455), the first week for Ghosts could be a lot better this time.
Don`t know if it`s true, but i read that not all stores are stocking Ghosts and other games too, btw.