Lmao, these are both very funny.
I'm not sure if the second article is trying to be funny(Lmao) or what. From personal experience, though, I know that using pressure is not the answer to playing high OR better. I used to play using a lot of pressure, but recently I began to play with a better tone and range. I experimented to see what it was that made the difference. It was the inside of my mouth. The key to a good tone is to have an open mouth. Not OPEN, but like you're about to sing a really deep note.
Sooo.... DONT USE TOO MUCH PRESSURE!
I'M SERIOUS, IF YOU DO, I'LL HUNT YOU DOWN AND EAT YOUR HAT!