Given how K2 looks, i doubt it.
Though they might be using X amount of processing for whatever thus actually using 100% of course their code can be optimized so they can run more while maintaining using 100% of whatever.
So yahh, they might be right and wrong.
PS ignorant fanboym they said they HOPE to use 100% any one thats has ever done any programming can tell they wont but the fact they are ameing for using all its power means good things for the gamer.