I actually have a thread called Shreading time on X2010 Challenge about this. But today yes i completed it with the controller . Monza is VERY EASY to get bronze on took me 5 attempts, and if u look on youtube its the ONLY 1 thus far it appears where u can get gold with a DS3 controller on. Ive only done bronze on all events. Nurburgring is HARD, but doable, took me about 30/40 attempts to be honest. You have to be on the limit though. Suzuka is the toughie though. I took about 400/500 attempts and eventually smashed the bronze in my only passing lap time being 1 and a half seconds faster than the desired bronze time. But its by far the hardest and on a rating its nearly impossible.
Difficulty ratings: (for a controller)
Monza: 6/10 EASY for X2010 challenge
Nurburgring 8/10 HARD
Suzuka:11/10 INSANE - Almost physically impossible to do with a controller, almost....