The limiter is just into the redline.. maybe 100-200rpm.
As for shift delay, its actually pretty bad! I think I was pressing the button about 500rpm from the redline in first and second gear. As you go further into the gears, the rpms are climbing slower and you can press the button a little later.
This is my first auto car and honestly it feels just like I'm playing CSR Racing for Android and trying to nail a perfect shift