Originally Posted by JeepZen

This is based on personal experience with the 5AT in my G35xS but I imagine it applies to the 370z as well.

I haven't seen this mentioned, but if you are in DS auto mode and get on the brakes, the 5AT will downshift with you and you can usually feel a little engine braking. The engine braking is not very aggressive, but it does downshift a bit ahead of your speed decrease so you do feel it. The really nice part is that if you get back on the gas fast, you are already in an appropriate gear for immediate acceleration. Most ATs would stay in the higher gear and coast so they would then have to drop a big downshift in this situation but the 5AT has already dropped to 2nd or 3rd so you get immediate punch from the throttle. It is actually pretty awesome.