That would make sense. I don't care for pugging in general, especially on challenging content. That said, even my guild groups seem to be adverse to wiping, which is what the OP said.
As there is no penalty for wiping, I have no problem wiping. As some background for me, I'm a mediocre player. My parses are normally around 50%. I still die to mechanics sometimes that I should have avoided. So sometimes even in heroics, like running a Heroic Shattered Halls with a Warrior tank and no CC, my guild still wiped several times. There was at least one maybe two guildies, who were getting increasingly upset and frustrated. Meanwhile, I had no problem continuing to push it as I know that will help me improve, and it's fun overcoming a challenge or obstacle.
You can see top guilds in Retail that have no problem wiping. They wipe and wipe and wipe until they beat the boss. There is never a "I give up" or "it's too hard". I don't know that any game in and of itself causes people to change their attitude about pushing through wipes, or giving up if they wipe too much. I think it's just the nature of some people. Some people have different definitions of what makes their gaming fun. Some look at dungeons and raids as farming, and wipes increase their farm time so it frustrates them. Others look at dungeons and raids as a challenge and wiping means they are being challenged, so they enjoy pushing through the wipes. Two different people, the game didn't create how they feel, and they have completely different definitions for what makes their game play fun.
I recall in the original BC that we encountered the same attitude of people being wipe adverse, though granted, it was probably more from pugs who helped fill out our roster that were wanting a full carry, and not happy to have to progress with us.
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The problem with Netherspite is that one bad player has the ability to cause the entire raid to wipe. And lets say you have 3-4 players that are pretty good, but occasionally has trouble tunnel focusing. If one of them tunnels their focus each attempt, it can lead to a long night of wiping.