Yes, b16 or itr are going to be the fastest.
(gsr and ls have the same 1st and 2nd gears)
The only reason that people says that gsr is best, is because of traction issues that arise...this can be solved with an lsd or just stickier tires. The mix of long and short help people get going with long gearing and then accelerate faster later, when the car is already moving.
There is no debate if you look at actual data or understand the physics