When you display your WiFi card, probably en0, in the Network Utility, what is the Link Speed?
On my 2012 MBA it is 300 Mbit/s.
My 2013 MBA with the AC TC shows 1Gbit/s there.
234 even when you are close? dang, you must have a problem with either the TC or the laptop.
When I am in the same room as mine, i get 867.
And I get nearly 100% of my 100/5 Cable Speed.
Agreed. With my TC in the next room about ten feet away with a wall between me, I see 867 transmit rate. Something is wrong with OP's setup.
i have a new 2013 macbook air and a new airport time capsule, i got it for of course the AC speed and i need a mass storage hard drive. my macbook air tops out at 30 mbps give or take on a speediest.net test no matter what i do. Both my HTC one and Nexus 7 get in the low 40 Mbps range when i perform the same exact test from the same server. i am aware of a file transfer issue with Mac OS and AC wifi but to my knowledge there was not an issue with internet speeds??
If you are referring to
this issue reported by Ars and others, it is a problem with the OS X network stack and it would impact Internet speeds also if you were on a fast enough connection, but you are nowhere close to the limits mentioned in the article, so that is not your problem.
The Ars article reports maxing at about 21MB/s (or 168Mb/s), so you are far from that limit at your 40Mbps. If I transfer a large DMG over AC to my TC drive I see the same ~21MB/s reported by Ars.
What do you get if you copy a large file direct to the TC drive?