The only time I heard anybody say "Sheldon was the best part of the movie" or some such thing was when my 11-year-old niece posted on FB that it was one of her favourite parts and several of her friends came on board to agree...why a bunch of sixth-graders are watching The Big Bang Theory (a brilliant but still racy show) is another story, but I digress... I don't mind people getting excited about the Jim Parsons cameo. I think it was a brilliant bit of casting, partly because Jim already had some Muppet street cred from his Sesame Street guest spot ("The spider's still chasing me!") and his presence matched up perfectly with the movie as a whole and this scene in particular. If you're familiar with TBBT and its celebration of the neo-geek/fanboy subculture, it works like a charm on that level, and even if not, Parson's appearance and how he was handled in the scene both line up perfectly with Walter and his "Man or Muppet" conundrum. While the scene still works even if you've already seen it and/or know Parsons is in it, I feel bad for Drtooth because one of the reasons my wife and I screamed with laughter (not an exaggeration) at that portion of The Muppets is because we didn't see the human-Walter joke coming. I think Disney did the right thing by keeping that key scene and cameo under wraps, and I'm surprised that they were able to do it given the insane amount of preview material that was released in the run-up to the North American release. (I accidentally viewed the "Montage" sequence thinking it would just be a random selection of clips with no real connection. I still enjoyed it in the theatres, but wished I hadn't watched it beforehand.) I actually had to beat myself away from this forum over the movie's first few days of release to avoid seeing more spoilers - I knew I'd have to avoid it after reading a couple of people's comments about the Sweetums/Mad Man Mooney & Sons scene (although that was still funny).