I am personally not bothered by the vocabulary of the writer, and I wouldn't be too sure that's he's aching to impress anyone all that badly...
But what I will say is that at least half of the text on that page is immediately voided in its point, because to say that your suffering will not be cured by ridding all negative thinking is a both a philosophical and psychological invalidity. If you have no negative thought, you have no negative perception, which in turn means you have no negativity of any kind. In other words - you would have no suffering if you had nothing but positive thinking. It wouldn't matter if you were dying from an open wound - you'd still not be suffering if you saw it in a positive light. Our minds work in strange ways like that.
I write about people's common interpretations of The Secret here:
Dirty Mechanism - Personal Development » Why “The Secret” Is Mistrusted