Being on the voter's roll goes a very long way towards establishing your identity, as it links a name to an address.
If you don't have that link, it's very likely that a lot of your credit info will not be connected up, resulting in what they call a thin file when they do a search on you - and so you'll get a low score because there's nothing positive showing up.
Thats a fair point, but if I use trans union as a reference it seems like the real value of being on the voters roll comes in after a few months of being on it and not moving around. Let me see if I can find that again.

