Logan has had his mind messed with enough times to know when someone was trying to read his mind. The result of more than half a century of government agencies wiping his memories, inserting memories, or otherwise messing with his head had made it damn near impenetrable to all but telepaths on the level of Xavier.
Unfortunately, he didn't know the new students well enough to know who was trying to read his mind. He walked past Scott on his way to the pizza boxes, as he passed he whispered, "Seems like one o' the kids wants to know what's in my noggin. You aren't as difficult to read. Guess the kids will know soon enough." He then continued on his way.