Last year, when I called, they told me that they only got up to season ticket holders up through 1988 for upgrades so they never got to my number again. The one year that they did (a couple of years ago) it was during the time when they asked for specific sections and rows on the upgrade form and I was too ambitious and they didn't have it available so they passed me by. (Of course, they change the form every dang year...) I don't expect an upgrade yet again, although I wrote "best available". We've only had our tickets since 97 so more than likely they won't get up to our acct again.
Of course, my pet peeve in all of this is that they allow ST holders to add seats to their accts (based on seniority) before moving anyone else down so in essence, they'll never get to the higher numbers to move. People add seats to their accounts and since they've had tickets the longest, the extra seats are the best ones... That leaves no chance for 300 level people to move because the long time holders aren't up there.