It is real. It is real code that is being processed by real ps3 machine. It is code that is based on real algorithms written by real human beings. We can measure it, we can test it, we can see it, we know it exists and we know it is real.
It is a fact that the ai in gt5 is bad. Just because you try to twist it to sound like the badness of the ai is the fault of the user doesn't make it true. You can believe whatever you want but ai in gt5 sucks period. It is slow (fact), it is stupid (fact) and it is bad game design (fact).
We know it is slow because the lap times are slow. We know it is stupid because it makes same stupid mistakes over and over and over and the faults of the ai are extremely easy to demostrate. And we know it is bad game design as well simply because there are a LOT of people who think the ai sucks. So it is not "just a problem in my head"...