I am excited by iOS 7. It's like discovering a whole new OS.
I am actually thinking it's kind of shocking to do something as radical as that. Is my mom going to get it? She's barely gotten used to the old iOS.
And for the jailbreak sentiment: iOS 7 finally has the ability to block calls and messages. So now I don't need a JB anymore.
I've been using it on my phone and I love it. I always had to jailbreak my phone, but I don't feel like I need to with iOS 7. Though I wish they'd add Quick Reply and then I'd be set.
But, so far, for me, it's been very fluid and smooth.
Drains battery like crazy though. I went to bed 100%, woke up at 3% six hours later.