I haven't "golded" them all yet, just B, A, IA, & S. I still need to finish IC and IB. In those two I have a few golds, the rest silver, no bronze. But, I have found the hardest to be not in a license test, but actually the first round of the Grand Tour in the Alfa at Eiger. I spent a ton of time yesterday trying to get gold on that one. I got down to .047 away from gold, and then I couldn't get any closer. I put the game down for a few minutes, then tried again and blew away the gold record by -.300.
I am much better at the game now then I used to be when I first got it, so I think if I start trying the IC and IB licenses I shouldn't have as much trouble as I did originally. When I initially tried the Grand Tour 4 event, the time trial in the Ford Focus, I couldn't even get silver (I attempted it in early December probably). But now, after running against stout competition in online events, I am much better. I tried that same event last night (Grand Tour 4), and just after two tries I got gold by -.700. I hope I am not getting full of myself when I try to gold those remaining license tests!