Typical song for those kinds of bands sounds more like this:
YouTube - blink-182 - Stay Together For The Kids: Original Version
Which sounds very similar to this:
YouTube - Kelly Clarkson-Since U Been Gone
You can go ahead and post the odd song by them and say "Look they're punk (and I don't even think that song is very punk, much too poppy)" but the fact doesn't change Sum 41 is more likely to release stuff like "In To Deep" or "Still Waiting"