Need some feedback from you guys.

I notice that some fridge got different configuration. Some has the freezer on top and some at the bottom. (In fact, only Panasonic has the ones at the bottom that I know of). I know that the advantage of the bottom freezer is that it is easier to take things like vegetables without bending down. But the disadvantage is (I heard from salesman) that the fridge will not be as cold as compared to top freezers. Is this true? Also, what other Pros and Cons when comparing Top and Bottom Freezers in fridges?