Ron's brow furrowed when Harry started mumbling. Even though his tension eased off a few notches at hearing him speak, he knew it wouldn't ease completely until Harry's eyes opened again and he spoke sense.
A moment later, Ron was pushed to the side as a mediwizard approached Harry's bedside and started running his wand over him. "Hmm. That's odd, that is. Nearly everyone we've seen has their magic levels almost completely restored, but your friend here's registering close to nil. Almost like a Squib or Muggle. We'll be keeping him for a bit, I daresay."
With a few more mutters, the mediwizard bustled off with another mutter about moving Harry up the queue for a Healer's perspective; and left Ron looking between Harry and Hermione in shock before dropping into a nearby chair.
"Harry's registering nothing?" He said it softly, "that can't be good news."