I haven't checked the exit polls from the last election, but 80% sounds very high. That number (and more) is reserved for our African-American friends. I know you put the "new Latino citizens" phrase in your quote, which gives you an out, but I seriously doubt any group votes as monolithically as "the community" .
Have you checked the vote returns for the heavily Latino South Texas counties and precincts?? Do it whenever you're ready for a rude awakening..