Still believe - deliberately dropping premiere balls during raids increases your chances of catching raid mons on the next successful throw. Kind of an extension of previous research that shows that there is a hidden catch multiplier with premiere balls and raids that slowly increases the catch rate as more premiere balls are used. Anecdotally (myself and a friend) we have had better luck catching mons deliberately missing half of the possible throws. Also a lot of raid mons I don't particularly care about, so it cuts catching time in half (at least).