I give up. ::)They never were and never will be by your criteria.
They are right more than they are wrong. You, me or anyone else will never beat them in the long run. That is what the PUOSU is about.
All I'm saying is that they should be accurate within the margin of error. If the error is more than 3%, it's not accurate and I feel comfortable betting against their accuracy. Alternatively, pollsters can stop being so cocky and tell you the truth that they don't know anything and the actual margin of error is far higher than 3% and as high as 15%.