Here’s a mystery for which the web doesn’t seem to have an answer for so far: Apple claims that the use of a 40 MHz Wide Channel for 802.11n Wifi is not allowed in Austria, Estonia, Germany, Japan, Latvia, Slovakia, Spain and Great Britain. Consequently, Apple.fr says the new Airport Extreme is 5x quicker than the previous product while Apple.de advertises the Airport Extreme as 2.5x quicker.
I’ve done some research as to why this should not be allowed in Germany but came up empty handed. Other web sites such as this one have the same question. Anybody got an explanation for this?