Yes, they are located in the Northeast, but - unlike other pollsters - they have absolutely no statement attached to these results concerning the poll's methodology. They don't even say whether all respondents were US citizens.
My guess is that whatever technique they used, they oversampled Dummycrats.
That doesn't stop those who want to believe.
From July 5 - 11, Quinnipiac University surveyed 2,311 registered voters with a margin of error of +/- 2.0 percentage points. Live interviewers call land lines and cell phones. The Republican primary included 913 voters with a margin of error of +/- 3.2 percent.