I've been Googling and one long standing question about exit polling are questions as to how many precincts are sampled, or even if there are truly that many people working for the exit poll companies:
In a telephone interview I had with long-time VNS communications director, Lee C. Sharpio, she agreed to the 1964 date. But that's about all she would reveal. There is no transparency to VNS. Shapiro will not tell you how big their budget is, nor who hires the 46,000 people she claims they use on election night to collect exit polling data, nor will she give you any proof that these 46,000 employees exist...no phone logs, no emails lists, no documents to prove that they do what they say they do. Shapiro would not let me talk to any employee of VNS's regular staff of 30. She says that VNS will not let anyone witness their operations on election night nor would she disclose its location. VNS has no website and a very uninformative brochure. http://www.ecotalk.org/VoterNewsService.htmI'm 50 yrs old and I've been voting since I was 18 and yet I've never seen an exit pollster.
The CA Exit Polls were done by Edison/Mitofsky Research. They are also known as National Elections Pool and were formed shortly after VNS disbanded. Here's an article from their site:
Media Group in Deal to Conduct Exit Polls
By THE ASSOCIATED PRESS
NEW YORK (AP) -- The six news organizations that disbanded Voter
News Service last month signed a contract Tuesday with two
veteran polling experts to conduct exit surveys of voters during
the 2004 presidential election.
ABC, CBS, NBC, CNN, Fox News Channel and The Associated Press
announced they had reached an agreement with Warren Mitofsky of
Mitofsky International and Joseph Lenski of Edison Media
Research. Terms of the deal were not disclosed.
....
Mitofsky and Lenski have spent many years in the business.
Mitofsky pioneered a sample precinct polling system while
working with CBS and ran a predecessor of VNS. Lenski worked
for him before starting his own firm. Mitofsky built a limited
exit polling operation for CNN during the 2002 election.
....
While there might have been other options for building a new
exit polling system, the former members of VNS ``felt that this
was a bird in the hand,'' Mason said. http://www.mitofskyinternational.com/