When I first bought the router, I took it home and hooked it up immediately and connected all of my devices and started streaming movies. I had 2 PS3's, 1 desktop, 2 laptops, 1 Ipod, and 2 Iphones 5's all streaming at the exact same time via Netflix/Amazon/Hulu and noticed no lag or choppiness on my 30MB/6MB connection from Comcast.
This router has very good throughput and it should be able to handle most everything you through at it.
Ours is currently in use by two laptops and a desktop.... We are not all doing super intense stuff at the same moment (like video streaming). Oh, and all three of our smartphones also. I don't notice speed degradation issues.
I wasn't sure so I tried an experiment. I streamed a netflix movie on my computer. I was talking on Magicjack VOIP phone service. Updated apps on my Iphone and ran a speed test on my Ipad all at the same time. Results were with my wirelesss connection on my Ipad speed test were PING 64 MS, download Speed was 39.27 mbps, and upload speed was 4.98 mbps. Not bad running everything at one. I pay Bright House Networks for 40 mbps connection. Couldn't ever get it with there supplied modem/router.
I haven't checked that. My desktop and xbox are hardwired with ethernet cable though. What are the odds that you're going to be using anywhere near 50 or 100 mbps on more than one device at any given time. Netflix only uses a few Mbps. Simultanious wireless file transfers may slow it down, but i havent tried that.