Could very well be.I think something people often overlook, I suspect much of this tuning has to deal with emissions compliance too.
The reason why so many toyota drivers swear OV TUNE is how their tacoma's and 4 runners should have left the factory, is because Toyota had to calibrate their vehicles to certain restrictive standards knowing they will be selling millions of units.
Just my speculation.
But my Tacoma was absolute shit to drive. So much so that I got rid of it after six months.