I think the Snopes people fell for the "dumb teenager" stereotype, unfortunately:
" Polysyllabic terms such as “gregarious,” “impregnable,” “conscientious,” and “ecstatic” turn up within four pages of each other, yet we’d be surprised to find any one of these words in a real teen’s diary. It’s not that teens don’t use large words in conversation or include them in written work meant to be handed in at school; but they certainly do not record their deepest, darkest secrets in words they’d be hard-pressed to spell."
" Polysyllabic terms such as “gregarious,” “impregnable,” “conscientious,” and “ecstatic” turn up within four pages of each other, yet we’d be surprised to find any one of these words in a real teen’s diary. It’s not that teens don’t use large words in conversation or include them in written work meant to be handed in at school; but they certainly do not record their deepest, darkest secrets in words they’d be hard-pressed to spell."
They got everything else right, though, I'd say.