Could it be that the effect these words have is dependent on the English mastery level of the listener? The two mayor groups of listeners: one of people who speak English as first language, the other one learned it later (in school).
For the second group, the words stemming from Latin (sophisticated English is basically all derived from Latin) are simply more entertaining to read (wow, what a crazy word!), listen to (they sound important) and decipher (many are not taught in school).
It also seems to help Death Metal achieve a more uninvolved narration, although this is maybe only so in the experience of the second group.