Your ranking in the Seasonal TT's is not a very good measure of your skill set as compared to the rest of the world by any means. If you are relying on your ranking as a true measure of your skill set as compared to everyone else, you are only fooling yourself. I say this for two main reasons.
1) Not everyone participates in these.
2) Those that do participate, not everyone of them gives it their full and honest effort. Some, even some of the aliens, just get Gold and done.
If you want a true measure of how you rank among the people of GT, do the Academy TT's that are going on right now. The Academy seems to bring out just about everyone and most everyone is giving it their best effort just because its the Academy and it brings with it a lot more attention. The final event should be even a better measure of your skill set as compared to everyone else. I have experienced this myself so I know it to be true. Alot of people praising me and giving me kudos for being such a great driver, which btw I do truly appreciate, and I always have to tell them that I'm not that great at all....matter of fact I would rate myself well below average if you realistically look at the big picture. My example is this:
Average Seasonal TT finish: 50-100th place
Average Academy finish: 4,000 - 5000th place.
As you can see in looking at the "big picture", I'm not that great at all, well below average. Sure, the Seasonal TT's are a great way to have fun and compete with your friends and I have fun doing them myself, but don't rely on them as a true measure of your skill set, its a false positive.