The memory chips probably have been tested to have the same RF charactaristics. If the radio is on a separate board, they don't change the radio, antenna or anything that might affect interference, I don't think it needs to be retested.
That's been available all along.
word to the wise: http://buyersguide.macrumors.com/
It never hurts to do a little research before shelling out hundreds of dollars. They've had this thing on "don't buy" for quite some time.
I don't think their rating could have been considered accurate with just one data point.
Doesn't it usually work that after a long period of time the price of storage goes down? The increased model then sells for the same as the high end previous version? What gives this time? The 8 &16 GB flash drive hasn't decreased in cost since last September- 6 months? Wouldn't these drop in another 3 months at most? Who would buy now at these prices?
I don't think they have competition yet. A quick search turns up no other media phones / smart phones with 16GB of memory. I expect that will change in three months, but for now, no.