Stategic Vision is a Republican polling firm, but Vorlon felt is was accurate enough to trust during 2004. He knows more about what to trust than any of us, so I think numbers can be presumed accurate.
They may be good nationally, but in statewide races Georgia, their numbers just can't be taken at face value.
Strategic Vision's CEO, David E. Johnson, was named Honorary Chairman for the National Republican Congressional Committee's Business Advisory Council.
I read their poll information all the time, and it's frequently quoted in newspapers here, but I've noticed a slight GOP bias in Strategic Vision's polling over the many GA races they've covered. Conservative columnists in local newspapers often cite it as a "Republican polling firm."
Similarly, any WSB-TV-Atlanta Journal-Constitution poll conducted by Gallup seems to have a lean in the other direction in GA races.
To get the best idea of the GA political scene, we at the campaign I worked for would take the average of the AJC and the Strategic Vision polls.