I think, there is no difference first, second or third game, if you are lucky enough at that day, you win, that's all.
That's all and it comes usually to the beginners so we therefore conclude that beginners luck is true. I believe that it comes to the right person but not all the time its applicable to every beginner that is gambling. The only thing that I can say if a beginner is lucky that will push him to play more.
I think that beginners would visit casino with a gambling expert and see how he plays the game and try to catch the tricks and skills of gambling. I dont think that only luck will get them money. No doubt that luck is a main factor in gambling but not in all gambling. Beginners should avoid difficult games because these are not for them. They will just lose their time and money.