Ok, I will not lie to you,...this is really really cool!
I have calculated the year over year change in teams times and posted them on the true rankings site. However, a clear trend was observed with slower boats all having slower times when compared to last. I believe this discrepancy may have been introduced when I improved my regression techniques and used polynomial regressions in place of liner regressions for the current season.
Long story short, I had to adjust the year to year changes using regression technique. These "ture" changes are under the heading "Adj. Chng.". I then used arrow indicators to show boat movement from past to present season (under the heading "Move"). Enjoy!
http://www.dragonboat-truerank.blogspot.com/