^Yes they do exist.
I think it's caused by a knee-jerk reaction to dislike whatever supposedly "replaces" the something that people liked and (in their opinion) was doing just fine.
I remember hearing the same sorts of comments when Firefly promotions were first starting up at FOX and Dark Angel had just been canceled. Many people, one in particular that I'm remembering, said that he'd never watch Firefly because they canceled the much better Dark Angel (He said this having before Firefly had even aired.)
Of course, flash-forward to today and he's got the Firefly Boxset & the Serenity Special Edition sitting on his bookshelf with Dark Angel nowhere to be found.
Go Figure.
Dont' get me wrong, I watched Stargate: Atlantis, and enjoyed it for the most part, but I'm not mad that the creators and studio want to try something a bit different. I just hope they can pull it off and I hope that SGU ends up being more BSG than SGA.