Every time you see a player crushed with a hit right to the head, then wobbling all over the place and barely able to stand as he makes his way to the bench, it's a concussion. Teams always try to BS and play it off as "just some whiplash," "an upper body injury," or "getting your bell wrung," but that's a load of crap. If a hit to the head causes your legs to go all wobbly well after the hit, that's because you just sustained AT LEAST a minor brain injury.
Doesn't mean it's a BAD concussion, sometimes players can come back quickly (and more often, they come back quickly when they really shouldn't), but it's still a concussion. Whiplash is a neck injury, it causes neck pain and headaches, it doesn't take away your ability to stand upright. "Getting your bell wrung" is just hockey-BS-speak for "minor concussion."
Anyways, hope Lupul is fine, hope he heals quickly, but I also hope they don't rush him back before he's ready. If Leafs coaching/medical staff are willing to ignore an obvious concussion and try to write it off as something else, I do worry that they'll be willing to ignore more subtle signs that Lupul isn't truly 100% in an effort to rush him back to the ice.