Weighs as much as an iPhone 4 with a case :) Not a deal breaker. The iPhone 5 feels way too plastic to me.
As I always point out to my friends iOS and Android needed ~3 years to become competitive. It's getting there. The App argument is also kind of flaky... Other than Mint app, everything I use is there.
Don't agree at all of what is said about Windows Phone 8. It's something new and fresh, and I feel people will get around to it. Have a Lumia920 and couldn't be happier. Win8 on the other hand... Different story :D