Did Ingo claim that he was testing BFS against the mainline scheduler for BFS's intended use cases? No.
"I'd guess that a machine with more than 16 CPUS would start to have less performance."
Even if you consider hyper-threading to result in 16 cores (which is not the case at all), in his FAQ Con claims that BFS should perform well up to 16 cores.
I realize how people can be very passionate about Linux and how the scheduler as something that critically affects user experience becomes important, but is all this emotion really necessary?