My logic is on the line. And its proved further that Naruto not having FTL reaction speed, just hypersonic level bcus he not managed to avoid the fire ball fired by Sasuke earlier, instead chose to block it. For light speed character with great sensing power, they can overcome all of that easily. Bcus why? Bcus they are faster than the attack could reach them unless the fire ball fired by Sasuke travel at light speed.Your logic forgot about the huge fireball naruto was holding off,when sasuke attacked him.
Look at how FTG user manage to avoid any in coming attack easily even in numbers of directions. It bcus they are faster than all those attacks. In close distance combat FTL speedster can rival Instant technique(teleportation users). Example of other anime is DBZ(Goku vs perfect Cell). Cell never learned Instant transmission before but he can match Goku's instant transmission technique that Goku incorporated into his fight easily bcus he amp up his speed(I dont really sure to what level, maybe close to relativistic).
All in all, this also another weak excuses from another people(you).