People that notice the difference in human behavior based on purchased material are generally dealing with their own mental issues, mostly stereotyping.
A material object doesn't actually change human behavior. If I'm an angry Android user and I get an iPhone....I'm an angry iPhone user. The iPhone isn't magical, it doesn't change the internal wiring of my brain.
You just aren't noticing the angry iPhone users out there because of your own bias. They are saying things you want to hear so you over look them. Plus you are generally looking at things that revolve around what you like so you see the people that criticize those things. Go look at things YOU don't like and you'll see people saying the same angry things that you less angrily agree with.
I enjoy Android and iOS a like and I see just as many angry people that are very vocal on both sides.
Nice! Well said, and I couldn't agree more.