Don't know if it's been mentioned yet, but IOS 6 is available now. I've already updated my iPod, iPad and iPhone
The installation was one of the fastest I've ever had. My download from itunes at home was 847 MB and finished in less than 5 mins. Installation was another 15 mins and it was all done then.
The OS does seem a bit snappier and the little things done here and there is pretty cool like the options now available when answering calls to reply with a text, etc..
My major gripe is the maps app. They are missing a buttload of information and I'm reading forums where people have posted hundreds if not thousands of instances of getting erroneous information. Things like showing year old closed shops, no re-routing when missing your street, map server access issues(though that could be expected today), search finding 0 fast food chains, etc..
I had trouble getting the dropped pin to work correctly, it wouldn't know the address of the street I would drop and didn't give any option to get to the address when it was the same street I live on. Sure there are going to be issues and it will only get better with time, but right now I wouldn't use it when going out of town.
Here's an article discussing the maps grievances.
https://tech.fortune.cnn.com/2012/09/19/the-verdict-on-apples-new-map-app-compared-with-google-maps-it-sucks/