We tested the wireless performance in various scenarios to see how the Cisco Linksys E4200 performed in typical real-world situations for both its 2.4GHz and 5GHZ modes.
The first was a same-room configuration transferring a large file from the router to the laptop. The second involved the laptop being placed one brick-wall and a standard wooden floor away. Finally we ran a distance test at 25m with a direct line of sight, to see how it coped with distance.
Same room transfer speed
One room away transfer speed
25m line-of-sight transfer speed