Harry could have rolled his eyes. "Of course you are," he answered. Really he should just stop asking his children how they were. They'd be so surprised they might actually tell him something out of pure shock. Alternatively they'll one day decide they wanted to give him a heart attack and actually answer.
"Have you been training?" he asked instead, because that was concrete. He did not fail to see where Al looked, and could only hope that Snape had the sense to handle that well.