I found the quarter pounders in the UK to be only slightly better than the US, but not by much. And chicken mcnuggets in Germany taste the same over there as they do in the states. And the french fries in the US, UK and Germany all taste the same. Those are the only countries I've had McDs in.

I did have Burger King in Nassau, and it was the same as the US, but considering how close The Bahamas are to the US, they probably get their food from the same companies that the US ones do