Yeah it's PURE BS! You'd have to be a math idiot to think 11% of the population (blacks) turning out in greater numbers is going to beat the other 89% of the population turning out in greater numbers. For every "extra" black voter this election there will be at least 2 "extra" non-black voters, who are turning out for the opposite reason.
One reason the pollsters may feel less pressure to “get it right” on election day this year is that if they’re way off, they don’t have to be accountable this time. They can just blame us, the voters, for misleading them due to racism.