Same here. My wife also loves it on her 4S... she, who is not technically inclined and ultimately a good judge of whether an interface is intuitive, is also enjoying it.
In my 15 years working professionally in IT, I have noticed some human propensities when dealing with technology. One of them is that people are rarely amenable to change.
If I upgrade a system and it includes a new UI, I can put money on a certain subset of users complaining vehemently about it because they have been pulled out of their comfort zone. Days, weeks or months go by and suddenly the complaints are non-existent. Why? Because people have either decided to embrace the change, or they just got used to it - and in actuality, it's still perfectly usable, just different.
Another trend I've noticed is that when you change something, regardless of whether the change is problematic or not, anything that goes wrong moving forward is related to that change - at least in users' minds. It doesn't matter if the system has been hiccuping in the same way for years, because I installed a transparent security patch, it has to be related to that change.
Such is life, I suppose... to be clear, there are some bone-headed design decisions that were made here in my view, but the overall improvement in functionality is profound. I have never been so satisfied with an iOS upgrade as I am with this one. I am sure the new UI elements will be refined over time (as they were after each subsequently iOS release), but it will take time and constructive feedback sent to Apple. If you feel strongly about something, Apple actually has a forum just for that:
Apple - Feedback
That said, whining like a petulant child rarely yields any results.