@Capt Chambo, thats why i put that "usually" in there. Having the derate thingy is the standard boeing configuration, you have to specially select an option not to have it. Same as you have to specially select an option not to have the aux battery or the lower low fuel warning threshold.
By the way, the 27k thrust rating used to be just our normal full thrust rating, not even considered a bump option. However we choose to rate all engines and planes down to 26k since we never really had to use 27k and it is a hell of a lot cheaper in maintenance that way. 98% of all take offs on the -800s are done at 22k anyway, on the -700 its like 99% at 20k (max rate 24k).