There is an very interesting new stuff on the Trophy list (on ps4 and PS app at least...did not try it on PS3 yet): for every trophy you can see the percentage of players who got it. (i am not talking about MT... just found it interesting for the analysis of the GT experience and the way PD may have used this data)
In the case of GT5, it's even more interesting as you can see where people stopped playing the career mode.
Only 25,4% finished the Beginner championship...that means 74,6% did not even get to Amateur. I think it's a huge issue...especially if they resold their game!
Other numbers (just for fun):
1.5% got to level 40 in A-Spec (how long must it take to get there? Anyone knows? I stopped at level 24 iirc)
2.4% got to level 40 in B-Spec (surprisingly high imo)
28,2% got to the ending video (I don't get that: how can they see it when only 5,5 finished extreme?)
5,5% finished extreme champ
11,4% finished the expert champ
20,7% finished the professional champ
22,5% finished the amateur champ
25,4% finished the Beginner champ
14,1% got the S licence
19,1% got the IA licence
24,3% got the IB licence
29,9% got the IC licence
39,6% got the A licence
52,9% got the B licence
Another surprising number: only 73,3% of players won a race in A-Spec. How could 27% not even win a race?!