lots of words that I don't want to spam the boards by quoting
Yes, this is true. However, unless I convinced m y friend to buy this game with me, every single player here USED TO BE A PUG. I've been there (and, yes, I still pug). We all know what it is like, and how unenjoyable it is to have a feeder on my team... hence why you find friends, who you know don't feed, and then play with them. Now you no longer have a feeder...
People who play premade are not some sort of different type of human species. We used to pug too... Many still do.
Regards to premades hosting lots of games instead of joining eachothers':
1) People know me, they know I have a reputable hosting record, that I give good games, that I'm not a dick, that I will swap third-men if they want, or kick a player so that a better player can come in, and takes losing with a grain of salt. People enjoy playing with me (remember, I pug a lot. Plenty of people have seen me around over time), so they join my games, they fill up fast. (well as fast as any does in this game).
That is why I host. Plus, it's easier to coordinate with your premade or pug-friends-who-you-are-playing-a-few-games-with since the in-game chat sucks. It's a simple 'join my game'.
2) It's not a guarenteed game. If I see a 4/6 I know I can't join... even if I do, I DO get kicked by the 'evil pug stomping premades' from time to time. At least sometimes