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Turn off Pando Media Booster P2P.
C:Program Files (x86)NCSoftLauncherConfigDefault/Games.xml
Look for three times the <P2P>true</P2P> happens and change it to <P2P>false</P2P>, and I read that has something to do with Pando Media Booster and working around it. They're not that hard to find, though there's a lot of code there.
Anyway, my download speed went from 17k/sec and like 10000+ hours, to 2.2mb/sec and it'll be done in an hour and a half or so.
This is probably known to some degree, just thought I'd post it since I've personally been so frustrated with their shitty launcher.