If by "perfect position most of the early game", you mean "at least 3 out of 5 CLG members were statistically behind TSM at the 10 minute mark" ...
I'm re-watching the game right now, and paused right at the 10 minute mark (basically right after Zion escapes TSM's second gank attempt when TSM took down top turret to even the count at 1 per team.
CLG's advantages:
1 dragon
Zion is ahead by 1 level and 7 CS over Dyrus
Aphro is ahead by 5 CS over Lustboy
TSM's advantages:
Santorin is ahead by 1 level, 10 CS, and 1 assist over Xmithie
Bjergsen is ahead by 1 level and 22 CS over Link
Turtle is ahead by 2 CS and 1 kill over DoubleLift
Lustboy is ahead by 1 assist over Aphro.
Also, CLG has just 1 ward past river - in the bush above bot inner turret, across from red buff.
Meanwhile, TSM had CLG's red side jungle completely covered in wards between the 9-10 minute mark - 1 was taken out at the raptor camp, another was taken out in the same bush that CLG had warded on TSM's side. 1 still placed in the tri brush, and one that Bjerg just put down on the other side of the river wall next to raptors.
And if you wanted to factor in the Rek'Sai tunnels, don't bother. Xmithie only had one on TSM's side, near raptors.
So again, I ask what you mean by "perfect position most of the early game". Apparently what you really mean is "CLG was really struggling to stay slightly behind TSM for most of the early game".