Macbook Pro Late 2013 network (WiFi and ethernet) issues

I must admin first, that I've read this complete articles before asking here:

- 2013 MacBook Air WiFi Problems (high latency, dropped connections) [Updated]

http://www.midwesternmac.com/blogs/jeff-geerling/2013-macbook-air-wifi-problems

- New Macbook Air - wifi connectivity problems (the 141 pages all of them)

https://discussions.apple.com/thread/5100655

- How-to Fix OS X 10.9 Mavericks – Wi-Fi Issues

http://howtoapple.com/mavericks-wifi-issues-fix/

- Late 2013 Macbook Pro Retina 13'' Wifi Issues (the 44 pages all of them)

https://discussions.apple.com/thread/5535320?start=630&tstart=0

- And some other pages looking for "macbook pro late 2013 network issues"

https://www.google.es/search?client=safari&rls=en&q=macbook+pro+late+2013+networ k+issues

I have my "old" 2008 Macbook Pro, and I've bought a new one (late 2013 version). I've experienced serious network issues, not only WiFi as everybody is claiming on the Internet, but also ethernet network issues, and I'd like to share here my benchmarcks.

I've tried everything described in those articles and others I found, as to:

- clean PRAM

- reset SMC

- delete System Configuration folder (bluetooth and/or wifi and/or complete folder)

- upgrade to 10.9.3

- change order (to put Wifi first) in network preferences locations

- disable iCloud completely

- disable "Wake for Wi-Fi network access" in Energy Saver

- disable bluetooth

- create a little script to ping every 0.2 the router

- reinstall everything (fresh install 10.9)

All tests were done in a clean environtment (just the current testing device connected to the network), and even reseting router in each test. My network is a 100Mb fiber optic. (I performed other tests in 3 other 100Mb networks and in a 50Mb network, and results are the same). I also did tests with a Windows 7, and Windows 8 laptops and have no problems at all (obviously).

I did all tests with http://testvelocidad.eu, a page when you can check network speed.

TESTS WITH MACBOOK PRO 2008

Ethernet. Speed shown in tests (in Mbps): 74, 79, 71, 82, 74, 81, 89, 70, 25, 76, 81, 83, 77, 79 (average 74.3, top of 89!)

Wifi. Speed shown in tests (in Mbps): 45, 48, 50, 44, 41, 47, 39, 45, 43, 36, 41, 42, 49, 50 (average 44.2, top of 50!)

NOTES:

- This Macbook connects to my WiFi with 802.11n

- Bluetooth does not affect the tests at all

- The graph grows normally and test is running well

TESTS WITH NEW MACBOOK PRO LATE 2013

Bluetooth OFF

Ethernet. Speed shown in tests (in Mbps): 43, 45, 42, 40, 40, 30, 35, 44, 37, 35, 39, 48, 37, 36 (average 39.3) << SLOW !! Top 48

Wifi. Speed shown in tests (in Mbps): 24, 23, 18, 21, 24, 25, 22, 23, 20, 24, 19, 23, 21, 20 (average 21.9) << SLOW !! Top 25

NOTES:

- New Macbook connects to my WiFi with 802.11g, impossible to get a "n" connection even touching everything in router. I had an option to just connect to "n" networks, and then WiFi does not even recognize my network.

- I tried with DHCP, and static IP (both in WiFI and ethernet tests)

- I tried changing the MTU manually to 1453 as some forums said (in WiFi test) (https://www.google.es/search?client=safari&rls=en&q=macbook+wifi+issues+change+m tu+manually)

- It's curious when running the test (both in WiFI and ethernet tests), the graph is growing and after 4/5 seconds, it shows flat line for the rest of the 10 seconds test, never grows again (http://cl.ly/image/1w473J0L0J2I)

Bluetooth ON

Ethernet. Speed shown in tests (in Mbps): 41, 45, 40, 39, 47, 46, 46, 43, 42, 41, 46, 47, 49, 47, 42, 44 (average 44) << SLOW AGAIN !! Top 49

Wifi. Speed shown in tests (in Mbps): 3, 5, 4, 3, 2, 4, 5, 4, 4, 3, 3, 2, 3, 3, 3, 3, 4, 3 (average 3.3) << DRAMATICALLY SLOW !! Top 5

NOTES:

- It's curious when running some of the tests, that after 2 seconds, the graph is frozen, does not move at all for 3/4 seconds and then the test finishes suddenly, it seems the network hangouts for a while!

Summarizing questions happening JUST IN NEW MACBOOK PRO:

- Why Bluetooth is affecting drastically the WiFi performance ? (from average to 25 to 5)

- Why even turning off Bluetooth I can't get the same network Wifi speed as old laptop does ? (from average to 44 to 21)

- Why I can't get the same network ethernet speed as old laptop does ? (from average to 74 to 44)

- Why can't Ethernet connection can't get more than 45/50 Mbps in all cases ?

- Why can't I connect to 802.11n networks (more people happening, http://apple.stackexchange.com/questions/131455/why-doesnt-my-macbook-pro-retina -connect-to-802-11n) ?

I know I can change the laptop for other new (store staff told me so, and I have Apple Care too), but I think this will happen again, since it's a hardware/software issue from Apple.

Thank you for any help