I've been trying these 3 races for almost 2 hours now and the best i can get is 5th on Laguna Seca, but i'm still around 20 seconds behind. I don't think i can shave off that much time, so i doubt i will spend much more time trying to win these.
I did notice that the AI really lets up in the last lap. In all 3 races, the leader seems to slow down to let you catch up. I started off Laguna Seca with a 50 second handicap and got down to 38 seconds by the end of the 4th lap, but made up 16 seconds on the last lap. My last lap was actually my second slowest lap time, and this has happenned almost every time i race these new seasonals.