A few hours ago Apple started releasing iOS 7 to its customers. Already the vast majority of the news media is suggesting that one might wait a month or so before upgrading. I've only seen one article suggesting you jump in now... that was on Lifehacker (I think the author was trying to start an online party for early adopters).
For a company that prides itself on making things that "just work"... they've clearly done a poor job.
Here's a selection of the articles that have just come out, it is no where near exhaustive (imagine how big the list will be in a day or two):
Audiobus Warns Musicians Against Upgrading to iOS 7 (Updated) | Evolver.fm
iOS 7 Release: The Home Screen Still Looks Ugly As Ever
This next one is amazing... it's a guide to disabling many of the new "features" of iOS 7. It reminds me of my How to Live with Windows 8 post.
iOS 7's Biggest Annoyances (and How to Fix Them)
Watch out, iPhone owners: iOS 7 may sneak up on you - NBC News.com
Apps Crashing? You May Want to Wait on iOS 7 Upgrade
Apple iOS 7 Crashes "90%" Of Apps On Your iPhone, Says UTest | Bustle
Why upgrading to iOS 7 could be a productivity killer | ITworld
6 Reasons to Upgrade to iOS 7 Right Away and 5 You Shouldn’t | TIME.com
10 iOS 7 Features That You'll Hate
How to Find Everything That's Moved in iOS 7
Apple Inc. iOS7: Top 5 Reasons NOT to Update Your iPhone, iPad - International Business Times
Five things missing from the iPhone 5s you can get in Android smartphones | ZDNet
iOS 7 to iOS 6?: No Way to Switch Back to iOS 6
iOS 7: Hear the reasons why you should, shouldn't upgrade? | Detroit Free Press | freep.com
iOS 7 Is Lethal To iPhone 4S But Not iPhone 5 Battery Life | Autoomobile
iOS 7 'could cause iPhone apps to crash' - Telegraph
Apple's iPhone iOS 7 has new features, likely drama | wtsp.com
iOS 7 upgraders reporting installation, iTunes issues | Apple - CNET News
It's technically Friday before the iPhone 5C/5X actually launches. However, there are already reviews and news of problems.
BEWARE: Apple hand-selected a small set of reviewers... the people doing the reviews know that if they want to get picked next time, they have to play nice.
Review Roundup: The iPhone 5S and iPhone 5C - NYTimes.com
Apple’s iPhone 5s and 5c: Review Roundup - The Washington Post
The iPhone 5C Number Apple Doesn't Want You To Know
iPhone 5S - 5 problems and pitfalls - Opinion - Trusted Reviews
iPhone 5s launch hampered by ‘grotesque stock shortages’ say networks - uSwitch.com
For Apple, mum's the word on iPhone 5C pre-orders
Apple iPhone 5C orders 'not overwhelming': carrier source | Reuters