Are kids nowadays becoming more spoilt than necessary?

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I notice that there are a lot of kids who can be categorized as "spoilt brats" who are arrogant and, well, plain annoying. Just the other day, a friend of mine told me about her encounter when her boyfriend's younger sister who is only 4 years old. My friend, the sister and my friend's boyfriend went out for a meal and when the boyfriend walked to the counter to order some food, she was alone with the sister. The sister then told her "My daddy, mummy and my brother love me very much. Don't you ever dare to think of bullying me! Because I am far more important than you!" If I were my friend, I will really give her a lengthy lecture. And there was this other incident when I was browsing for PS3 games in a store. This 5 years old boy just came to the counter and asked the shopkeeper rudely "Dude, you got XBOX? I don't care how much, I want one NOW. Here's the money" and he put down that big stack of $50 bills on the table. To me, that's very rude even though he was the customer. Have you ever encountered something like this before? Do you think parents are treating their children too nice nowadays?