Make up your mind. First you say 4 in 10 now you're saying all you see is flagships. So you're a bit confusing with your statements.
I wasn't referring to the whole world either when I made my comment. I was saying the standards for phones is increasing and especially flagships.
The smartphone market is very competitive as we all know. No one OEM or supplier can sit on their hands and think they got it made. All have to keep maintaining quality and user experience. Screw those up and you're on the downward spiral.
Android, iPhone and WP all have quality phones in flagships. Android and WP have some decent mid range phones. I can't say much about low end because I wouldn't buy one of those. There are also OEMs in the Android spectrum pushing down the price on higher specs, which I see as good. I don't see that happening with WP at the moment.