My brakes seemed to get softer when i increased the timing boost. I usually turn my brakes down 20% or so, but this weekend i had them maxed out. I also ran different EPA's this weekend compared to before, in an attempt to resolve my previous turbo loss.
As far as brake lockup goes, um yeah. I can definitely get them to lockup and the car to slide... you can even hear it in the tires. The tires squeal is a great indication of the cars cornering, throttle, and brake attitude...