Yes, they have been for generations and all across the globe. If you know the math, you will look at discrepancies differently. They have thrown elections out ,like in the Ukraine, when the elections were rerun over it. The people running exit polls have made it mathematically impossible form to be very far off at all.
If you think 2.5 is far off, explain 11 7 in Ohio in 2004.
Where’s the source for this?
http://www.youtube.com/watch?v=fLaQnvJ8myE Here Kerry v Bush as a beginning. I saw a documentary a couple days a go “how they did it in Ohio” done by the polling agencies.
The New Press | Books to Change Minds About Justice It was “How they did it in Ohio”.
Before the 2004 election ,I saw a program with one of the guys in charge of exit polling. He was shocked that in 2000 that his field was no denigrated in 2000. He defended his numbers and then showed how much more they were going to do in 2004. They were tripling the info and statistically he "knew " there was no way they could be off. Of course they were. It is far more comfortable to think it is the polling than to face the chilling possibility that our elections could be rigged. After a while, it becomes too ugly to ignore.