There may not be a huge number of people who find ios 7 nauseating, but for them it's a huge problem with no solution.
They can't turn off the animated zoom feature -- or whatever it is that's making them ill -- and they can't go back to comfortable ios 6. "I just used my phone for about 20 minutes and now I feel like I'm going to vomit," wrote knphoto10 in an online discussion.