He did notice. He had half expected it to be earlier than this and so, in some degree, Alec was impressed. Of course, he'd have been more impressed if Peter would have just gone the original pace he had set. As for himself, it was about ten minutes into when he seemed to be breathing heavier, like the rest had been a casual jog and now it was starting to show signs of its affect on him outwardly, though he had been sweating for a while now. He tried to slow down a little more, hoping Peter would think it was him who needed the change of pace. They were officially half way there. One marathon over, but they had a whole other one to get through.