Building on the disappointing results of this poll and the number of people who subscribe to TAG, I decided to do some more unscientific research for this journal. I don't know why, but it's my favorite genealogical journal. I would argue that this journal and the National Genealogical Society Quarterly are the only true-national genealogical journals. What kind of state coverage does TAG have? I looked at the last ten years' worth of issues and noted all the states in the titles of articles. I just looked at the titles only.
Over those ten years these states have been represented: MA, CT, RI, VA, PA, NY, DE, NY, MD, VT, NJ, OH, ME, GA, IL, NH, NC, KY, MO, FL, SC, and IN. That's 22 in total. All are eastern with a few midwestern states. Naturally, the 13 original states are represented the most. That's no surprise, since the type of article that helps the most people are the ones further back in time, and therefore have the most descendants now.
2000: Mass. 17 articles; CT 9 articles, with RI, VA, PA, NY, and DE.
2001: Mass. and CT, 12 each, with NY, MD, VT, DEL, NJ, PA, OH, ME, VA, and RI.
2002: Mass.: 13, with 14 other states.
2003: Mass.: 15, RI with 7, with VA, NY, CT, MO, KY, VT, and NH.
2004: Mass.: 14, CT with 6, and 9 other states.
2005: Mass.: 14, with 8 other states.
2006: Mass.: 14, CT: 9, and 11 other states.
2007: Mass.: 10, CT: 9, and 6 other states.
2008: Mass: 4, CT: 3, NJ: 2, and 7 other states.
2009: Mass.: 9, CT and VA with 4 each and NJ with 2.
The last two years the journal was in a publication deficit and issued double issues to catch up, so the diversity of articles has been less than in the beginning of the decade. However, there is a strong Mass./CT presence. NY is not as strong, but New York has an extremely strong state journal, The New York Genealogical & Biographical Record. The next strongest presence is Penn. and Virginia.
In any case, I strongly recommend subscribing to this journal. You will not be disappointed.