just to share my experience: since half a year I use an Asus RT-N66U router in my home studio, and it has been reliable and without noticeable latency. There were some problems with drop-outs, which could be solved with resetting the network setting on the iPad, but since iOS 6.1 it wasn't necessary anymore. Could have been a coincidence, I don't know.
In the music room I use an ad-hoc network with an old Acer Aspire One netbook, and it is also reliable. Never had drop-out problems.