Hmm, I think you're right. Maybe I am just getting it confused with the Tal Rasha proc.Are you sure? It explicitly says it does
and now looking at some results from google it seems like it's the case, I was just wondering cause it's blizzard after all...
edit: http://www.reddit.com/r/Diablo3Wizards/wiki/elementaldamage#wiki_elemental_exposure