In my experience, yes. It may have something to do with the fact that I am also the eldest.
For example, I wasn't allowed a laptop until I was 15 because my parents were suspicious about the Internet. Once I got one and thy realised it wasn't that bad, my brother was allowed one aged 11..
That said, they're not *that* overprotective. I've started going abroad with a friend. I've been to Germany, Sweden and Norway with him and have also been to Cornwall, Edinburgh and America without them. This year, I'm going to Amsterdam and France.
Although I am almost 18 now, I started these trips aged 15. I definitely can't imagine my brother (he's 14) being allowed to do something like that. In fact, I went to London with friends aged 13. The furthest my brother's allowed is to Stevenage..