No... They said 1200 cars... and they said GT5 had approx. 1000 cars... but this is wrong... without DLC, GT5 has 1033 cars, with DLC they are about 1085, I think
Kazunori Yamauchi 山内 一典;8759075
GT6 will have 200 new cars more than GT5. There are premium cars, but we are not going to differentiate between premium and standard cars anymore when we move on to GT6 because we aim to get rid of all the functional differences between the two. They will now have the same functions. More or less anyway.
http://robotsgonebad.com/2013/06/e3-2013-kazunori-yamauchi-talks-gran-turismo-6/
Speaking of having both versions, the Cizeta is listed as a returning car, but it was also just 'revealed' at Gamescom. I wonder if it's counted as one of the 200 new cars or not.
The Tesla Model S and Deltawing aren't even on that list and they were revealed at E3, before your list was published. So no, they aren't counting the Premium Cizeta Moroder V16T in that list.
Not counting those special editions, we are up to 34 new cars whose in-game models have actually been shown:
Abarth 1500 Biposto Coupe B.A.T. 1 Concept '52
Acura NSX Concept (NA3) '12
Alfa Romeo TZ3 Stradale '11
Alpine A110 1600S ‘72
Audi Sport Quattro S1 E2 '86
Audi Sport Team Phoenix R8 LMS ultra R16 (typ42) '12
Audi Sport Team Joest R18 TDI '11
BMW Motorsport Z4 GT3 (E89) '11
BMW Z8 (E52) '01
BMW 507 '57
Chevrolet Corvette Sting Ray (C7) '14
Chevrolet Corvette Coupe (C2) '63
Cizeta Moroder V16T '94
Ferrari 246 GT Dino '71
Fisker Karma EcoSport '12
Ford Shelby GT500 (S197) '13
Ford Focus ST (Mk.III) '13
Ford GT40 Mk I Road Car '66
Honda NSX Concept (NA3) '12
Jaguar XKR-S '12
KTM X-Bow R '12
Lamborghini Countach LP400 ‘7
Lancia Stratos '73
Light Car Company Rocket '07
Lotus Europa Series 2 (type54) '68
Mercedes-Benz SLS AMG GT3 (C169) '11
Nissan GT-R NISMO GT3 (Schulze Motorsport) (DBA-R35) ’13
Pagani Huayra '11
Renault Sport Megane Trophy V6 '11
Shelby Cobra Daytona Coupe '64
SRT Viper GTS '13
Tesla Model S Signature Performance '11
TRD 86 Racing (ZN6) '13
Volkswagen Motorsport Scirocco GT24 '08
We have a little less than 170 cars to go.