I agree it’s a minor irritation by most standards, but when all that’s on the line is making jokes about someone based on their choice of phone there’s no reason not to pressure someone else. As to sources, I see it happen all the time. I used to be the one who upset people, then I bought an iPhone and almost everyone I texted got really excited to see the color of our chat change. I’ve also seen countless memes about green chat bubbles and people ruining group chats because of their Androids. I’m not sure you’re going to get much more reliable sources than anecdotal ones for something like this.