Well, the keys were wrong in 2000, but they got around it by saying Al Gore won the popular vote.
You can not rely solely on one method.
The keys were right in 2000 in predicting the winner, as they were in every presidential election since 1984. They were not designed to predict when the voting process would be undermined by a Supreme Court decision.
Treat the earth well: it was not given to you by your parents, it was loaned to you by your children. We do not inherit the Earth from our Ancestors, we borrow it from our Children. ~ Ancient American Indian Proverb