After playing through the demo hype levels were at a maximum as fans pored over every minute detail, agonising over the true purpose of that damn mannequin finger.
Remember that NSMB 2 at E3 was much closer to release then NSMB U, and so NSMB 2 needed to be hyped up more hence why the demo's for that game had better levels and they had no problem showing the new ideas that game brought to the table.