For comparison, on Windows 7 (machine in same spot)

Up to 54Mbps
>iperf -c 192.168.0.102
------------------------------------------------------------
Client connecting to 192.168.0.102, TCP port 5001
TCP window size: 63.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.0.2 port 49809 connected with 192.168.0.102 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.1 sec  26.8 MBytes  22.3 Mbits/sec

Changed to Up to 144Mbps

>iperf -c 192.168.0.102
------------------------------------------------------------
Client connecting to 192.168.0.102, TCP port 5001
TCP window size: 63.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.0.2 port 49828 connected with 192.168.0.102 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  66.2 MBytes  55.4 Mbits/sec

Changed to Up to 300Mbps

>iperf -c 192.168.0.102
------------------------------------------------------------
Client connecting to 192.168.0.102, TCP port 5001
TCP window size: 63.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.0.2 port 49838 connected with 192.168.0.102 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  66.5 MBytes  55.7 Mbits/sec

================================================================

So, in summary:

                                                                                
  | Mainline 4.5rc5 | Windows 7   |
Up to 54 Mbps                                                       |      20.9 
Mbps      |    22.3 Mbps |
Up to 144Mbps (best for wireless range)        |      17.1 Mbps      |    55.4 
Mbps |
Up to 300Mbps (best for w/ performance)     |     19.8 Mbps      |    55.7 Mbps 
|

================================================================

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https://bugs.launchpad.net/bugs/1450755

Title:
  Intel Wireless-N 2230 4x faster in Windows 7 than 15.04 (iwlwifi)

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