ANGRY BIRDS: Skill or Luck

Angry birds happens to be a game I love so much.......I love the anxiety, the suspense, the paparazzi that comes with every bird and how to strike those greenish enemies........(I hope those things don't have a name :D). Trust me, if I come across any device especially if its not mine, the first game I check for is angry birds......then temple run....then others. By the way, my favourite bird is the bomb bird. (*whoop whoop*)

I was playing the latest angry birds seasons game and I got to discover that they made this particular edition a little bit harder (.......some stages though) and I also realised that the same tricks I had tried over and over again in some stages later worked for me (after about 10 trials *can't watch*). This brought me to this question: Is there a skill needed to complete angry birds or do you keep throwing the birds till they actually defeat the green guys???

For me, I think a little skill is needed and then a great amount of LUCK.....will like to know what you think.

Waiting...... :D