200k + concurrent viewers on a livestream. I was one of those viewers :).
TSM and aAa matches were really, really good. EG vs FN was good too, but only the 2nd game, the 1st one was won pretty handedly by FN.
Even though TSM and EN didn't make it through semis (and CLG was fifth =_=), the EU teams were really impressive.
In the EG vs FN semi-finals, Doublelift's Blitzcrank play was great but that didn't stop FN's push. I think both sides had great teamwork and skill. Actually, EG had greater skill individually. The key difference was the strategies. FN got the Dragon timing down pat, knew when to Baron, and were more aggressive. EG was ahead in kills the entire game in game 2, and I thought they would win, but they couldn't push as hard as FN. They had the advantage, but they let it slip, and FN pushed back and kept pushing. They didn't let up. Well, Dan Dinh on EG was one heck of an aggressive Nunu, but face checking bushes is never a good idea! :)
It's pretty much the same for the aAa vs TSM match. aAa looked like they were winning game 1, even though they were behind in kills and gold. They were much more aggressive when they had to be, and though they lost game 1 by mere seconds in a base race, they won games 2 and 3.
All of these teams had great team work, and great skill. I believe EU came out on top because they were more coordinated. NA teams have a lot of individual talent (HSGG, Doublelift, Westrice, etc), but EU did too and they also have good tactics. Hiding in the enemy's jungle near the Baron and ambusing them, using teleport on Malzahar on the wards to coordinate a gank with an Ashe arrow across the map, and using Rumble to melt Vlad's face...
Side note, disconnects in a LAN at a tourney? If EG's Westrice's Vayne didn't dc'd, wonder how game 1 would've turned out.