The Yes site may need help from Yoko Ono, the woman who made a major contribution to the world by helping to break up the Beatles:

     The statistical argument, stripped down, is that Tweets mentioning the same sex marriage issue were looked at.  Once those making multiple references were removed, this brought the Yes number down to 57 percent. But, then over 55-year olds were under-represented, so once the adjustments were made, the Yes figure went to 49 percent.
     I think though that this team did not factor in the multicult factor, of Chinese and Muslim opposition to same sex marriage. That will bring the percentage down even more.
     Hopefully, the Yes side will be defeated soundly. But, don’t slack off, you are doing well with your phone calls and door-knocking. Give yourself a big hug and pat on the back!