Now I wasn't a Math major in college, but I did take stats. The polling number is still very high. It does not matter if the base is larger, the poll is based on the actual number.

Companies pay big money for polls and stats that are based only in the low thousands. Most typical voting polls are based on just a couple thousand people and they have accuracy an within 2-3%.

A 140k+ user poll is very accurate with a +/- accuracy of much less then 1%.

I'm sorry to say, but statistically it does not get any better then that.