I went to Fivethirtyeight.com and copied the rating of various pollsters. Leaving out the data that led to the rating, here are the top-rated and bottom-rated. Go here to get the original data and the full listings. Generally, the ratings were based on the techniques used, the accuracy of the polls on a gross (batting average) basis, and what I interpret to be volatility.
I have highlighted the pollsters with over 50 polls. Those that have been "banned" by Nate Silver & Friends are shown with an asterisk after the rating. (Others were banned but were not either A- or higher or C- and lower.)
One observation: generally it appears that Real Clear Politics does not show bottom-of-the-barrel polls.
| Rank | Pollster | No. of Polls | Rating |
| 1 | Monmouth University | 71 | A+ |
| 2 | Field Research Corporation (Field Poll) | 25 | A+ |
| 3 | Selzer & Company | 37 | A+ |
| 4 | Elway Research | 18 | A+ |
| 5 | Ciruli Associates | 17 | A+ |
| 6 | ABC News/Washington Post | 51 | A+ |
| 7 | Grove Insight | 29 | A |
| 8 | Marist College | 146 | A |
| 9 | Muhlenberg College | 22 | A |
| 10 | National Journal | 12 | A |
| 11 | Public Policy Institute of California | 12 | A |
| 12 | Survey USA | 763 | A |
| 13 | University of Cincinnati (Ohio Poll) | 38 | A |
| 14 | Siena College | 42 | A |
| 15 | Fairleigh Dickinson University (PublicMind) | 18 | A |
| 16 | Research & Polling, Inc. | 26 | A |
| 17 | Fox News/Anderson Robbins Research/Shaw & Company Research | 24 | A |
| 18 | Marquette University | 7 | A |
| 19 | Behavior Research Center (Rocky Mountain) | 7 | A |
| 20 | Blum & Weprin Associates | 18 | A |
| 21 | NBC News/Wall Street Journal | 25 | A- |
| 22 | University of Connecticut | 7 | A- |
| 23 | Time/Abt SRBI | 7 | A- |
| 24 | Angus Reid Global | 29 | A- |
| 25 | Ipsos | 49 | A- |
| 26 | Quinnipiac University | 169 | A- |
| 27 | University of Arkansas | 4 | A- |
| 28 | IBD/TIPP | 17 | A- |
| 29 | CBS News/New York Times | 55 | A- |
| 30 | CNN/Opinion Research Corp. | 89 | A- |
| 31 | Los Angeles Times | 40 | A- |
| 32 | MassINC Polling Group | 11 | A- |
| 33 | St. Norbert College | 12 | A- |
| 34 | EPIC-MRA | 43 | A- |
| 35 | Western New England University | 11 | A- |
| 337 | Merriman River Group | 21 | C- |
| 338 | Opinion Savvy/InsiderAdvantage | 105 | C- |
| 339 | Rainmaker Media Group | 1 | C- |
| 340 | Consumer Logic | 4 | C- |
| 341 | University of Alabama | 2 | C- |
| 342 | McLaughlin & Associates | 19 | C- |
| 343 | Neighbor | 1 | C- |
| 344 | Zogby Interactive/JZ Analytics | 465 | C- |
| 345 | Southeastern Louisiana University | 8 | C- |
| 346 | Harris Interactive | 135 | C- |
| 347 | Ohio University | 2 | C- |
| 348 | 20/20 Insight | 5 | C- |
| 349 | Indiana University-Purdue University Fort Wayne | 3 | C- |
| 350 | Opinion Research Associates | 12 | C- |
| 351 | Optimus | 4 | C- |
| 352 | SurveyMonkey | 11 | C- |
| 353 | Loyola University (New Orleans) | 2 | C- |
| 354 | Clout Research/Wenzel Strategies | 9 | C- |
| 355 | Data West Polling | 3 | C- |
| 356 | Baydoun Consulting | 6 | C- |
| 357 | Fort Hays State University | 4 | C- |
| 358 | Brown University | 12 | C- |
| 359 | Nielson Brothers Polling | 6 | C- |
| 360 | WCIA-TV | 2 | C- |
| 361 | CPEC LLC | 3 | D+ |
| 362 | Marketing Workshop | 7 | D+ |
| 363 | Riggs Research Services | 1 | D+ |
| 364 | Dane & Associates | 2 | D+ |
| 365 | Brigham Young University | 4 | D+ |
| 366 | Massie & Associates | 2 | D+ |
| 367 | Valley Research | 6 | D+ |
| 368 | Millersville University | 5 | D |
| 369 | Jayhawk Consulting | 1 | D |
| 370 | Mitchell Research & Communications | 47 | D |
| 371 | Humphrey Institute | 10 | D- |
| 372 | TCJ Research | 133 | F * |
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