among the new features of the 2011 MacBook Pro, there is one that we had not noticed, it that it supports Wi-Fi with a speed reaching 450 Mb/s. We hadn't seen how important it was until we switched an 802.11n Wi-Fi network to 5 GHz with extended channels (the 2.4 GHz was overloaded).
The computer then connected to a Time Capsule (simultaneous dual-band model) at the maximum speed as you can see on this screenshot.
Of course, we ran a few tests and we were very surprised of what we saw. In both ways, Time Capsule to computer and reverse we got data transfer rates as high as 22 MB/s in the same room and 9 MB/s in another room with a concrete wall in between, which is not the best condition for a 5 GHz band.
It is quite an important improvement since with the older models of MacBook Pro, in similar conditions, our record was 14.6 MB/s in the same room and 5.5 MB/s from a distance.
It is quite an impressive improvement, plus we didn't know that the Airport Base station and Time Capsule (we tested both) currently sold by Apple did support that bandwidth.