Tapping "A" button to aid pokeballs?

K so I heard of this many times before but I figured it was just a myth......anyway I was playing pokemon today and caught a regular pokemon in a great ball but when the pokemon went inside it made an unusual sound......then when the pokeball fell to the ground it only wobbled once instead of three times......then I noticed I had been tapping the "A" button repeatedly the whole time and I figured that was the only explanation seeing as how it was only a normal pokemon and an ordinary great ball