Dont be so quick to assume that. Reviews of iOS7 have been very favourable, and the majority of the general public have more important things to worry about than app icons or which of their iDevices has what transparency![]()
The reviews may have been favourable, but in my experience the general public don't like change (look at the "outrage" for every design iteration of Facebook as a prime example). This is quite a large change (looks wise), and there will a large percentage of people who don't like it initially.
I predict quite a lot of Facebook pages and blog posts will pop up telling people "don't like iOS7? Here's how to change back to iOS6". All of this will wear off after a while as people realise apple won't change it back and they get used to it.
Anyway, to keep this on topic, I will be upgrading today.