I'd say that is the case for most cars but others just have an ultra piss-poor factory tune to begin with. I drove my Porsche 944 for about two years before I just plain gave up and pulled out the laptop, emulator, and the reprogrammable chips.
The car pulled way harder starting about 1200rpm sooner and just kept on pulling hard way past where the factory had the limiter. Oh yeah and the first half of the pedal actually did something. I ended up putting it back to the factory tune because I had issues which ended up being junk in my injectors and fuel rail.
All I can say is that I hate the factory tune and I am putting it back to the way I had it first thing tomorrow morning. It has been 3 days and it is pissing me off.
I swear Porsche spent the time to enlarge the engine to 2.7 liters and up the compression to 11:1, use bigger valves and intake, and then decided to use the tune from the 2.5.