Nah NiP were T side at that point - came back to win 16-13 or something playing CT. (an aside, it wasn't a huge comeback in the context of Nuke, but considering that Ex6tence was still considered the best IGL in the world at that point, and VG easily the second best team in the world, it was massive).
No no, definitely not individually, they've all had a bunch of LAN and tournament experience, but not at that level and with than much pressure.
I'm not sure you can definitively say they're the best NA team, but they're certainly the form team at the moment. CLG are probably the only other team who have been consistently good, i consider C9 to be done quite frankly.
Liquid still have plenty to prove, but this tournament has been huge for them, and i hope to see them continue this run of form.