After hearing Derek's answer, he figured it was a combination. Scott likely said nothing but Derek also just didn't hear it because he wasn't dwelling in the social space. And Stiles would be a liar if that thought didn't concern him. He knew way too much about the guy now to let him be alone with his thoughts.
He stared flatly, offering a shake of his head once. "Same old boring and grumpy Derek Hale, I guess, huh?"