I just upgraded from 100 Mbps to 1Gbps fiber internet and have a current generation 2 TB Time Capsule. With Wifi, I'm testing out about 300 Mbps at best (and 25 to 30 Mbps at worst at times--goes back up to 300 if I reset the time capsule or just wait awhile), but get > 900 Mbps with a direct ethernet connection. (The computer I'm using for speed testing is right next to the router.) From what I can tell, the time capsule is supposed to support speeds up to 1.3 Gbps, so I don't know why it's so much slower with wifi than direct connection. Any thoughts/suggestions as to what might be causing the bottleneck? Thanks Edit: Nevermind, answered my own question. Didn't realize that my 2012 iMac has 802.11n wifi rather than a/c. That would explain it.