I downloaded the IOS6 update, and this is the biggest reason I'm not in a hurry to install it.
I think of all the secondary apps (I think of safari, mail, music, messaging as primary apps), Maps is what I use the most. It's gotten to be kind of embarrassing, frankly. I feel like I can't go anywhere in the car without first plotting out the route, and checking the traffic. Love the app. I use it all the time. All the time.
I just downloaded Mapquest and a couple of other map apps to see if they actually work well enough so that I can go ahead and try the new OS. (At first glance, I see that Mapquest still relies on visual cameras for traffic info... doesn't google maps use cellphone signals to determine traffic speed?) And the visuals are certainly less sophisticated than the existing map app. The little car is cute, though.
Anyway, I'm waiting.