While in some applications the Brain Fuck Scheduler had not resulted in the workload being carried out any faster, what the tests don't measure is the responsiveness / latency of the system as seen by the user, which is one of the benefits of a good task scheduler.
With the 7-Zip compression test there was no longer a performance difference in the benchmark result, but the CPU usage was different.
The quad-core Intel Core i5 2500K CPU usage was nearly 10% lower when running 7-Zip with the Brain Fuck Scheduler over the Completely Fair Scheduler.
Above is a look at the CPU usage spanning several different tests. The average CPU usage with the Brain Fuck Scheduler was 7% lower than the Completely Fair Scheduler.
Those interested in more benchmarks can visit OpenBenchmarking.org.