You are disappointed because of ONE person's opinion? >_> Games are not factually easy or hard. I felt that SMG1 was harder than SMG2. I think this for two reasons: the first game has a lot more of that "spherical planet" non-sense and the overall level design bores the hell out of me.
Basically, I have this theory that the more fun and interesting a game's level design is, the easier it will seem simply because you are having a blast while playing it. SMG2 may have been the harder game, but it seemed easier because the level design was constantly throwing exciting things at me. Skyward Sword could very well work in a similar manner, in that it's hard to think the game is challenging because you're having so much fun with it.