I have seen many Wifi Benchmarks for speed only and not for reliability. I stopped doing wifi benchmarks for speed since i get very different values for the same board a few hours later,. For real life projects reliability and availability is what matters when you depends solely in wifi network. I would strongly suggest @tkaiser to include "reliability" in his tests, maybe a new thread. As for example  you can try iperf with -t 1000, -t 2000, -t 3000 and -t 10000 (if it allow