For me this is true. 6 out of the 10 tracks in GTS are fictional/PDI tracks. Realistically I only see GT bringing all FIA sanctioned and licensed tracks to the fray, of which some they had in GT6. The world circuits will make up an additional 8 tracks in the game. In addition, I see another rally track or point to point track, that being Pikes Peak, since GT has a license lock on the course. We know that Brands Hatch, Nurburgring, Willow Springs, and Circuit de la Sarthe are confirmed as real locations in GTS. I see Silverstone, Spa, Monza, Suzuka, Fuji, Mount Panorama, Red Bull Ring, and Circuit of the Americas, being the only new world circuit in GTS. And to top this off again, another rally course, or maybe point to point in Pikes Peak.
I would like to see GTS spread and include tracks into the game that are from regions not ever included in GT, like South America and the Southwest Asia (now dubbed "Middle East"). This brings the possibility of tracks like Autódromo José Carlos Pace (also known as Interlagos), Dubai Autodrome, and Yas Marina. I also would not mind seeing Paul Ricard. However, the issue with these tracks is they have one type of car race on them, and GTS is a game that has tracks mostly reflective off of tracks where all their featured classes can race on (or at least I hope).
And let's not count out tracks that have held events with GT sponsorship, like the Isle of Mann, which I see uncertain being included in the game for now.
But this news is still exciting and finally, we get some news on the content in the game.