Zero, I guess you work for PD as you talk as if you were their spokesperson. If the sole purpose of these 'ring time trials, both digital and real life, is to get the fastest times id think tires used would be the best tires possible. I vividly recall Porsche's meltdown when nissan's gtr broke their time in real life and how they pointed towards soft race tires which ironically they too used similar set of tires for their runs.
So by your logic if racing tires are unrealistic due to the major increase in grip, why include them at all when the main intent is simulation? And how do we know which tires to pick to simulate real life? For me race softs give you max grip all the time and even the stickiest tire in the world wont give you that due to tracks and conditions.
There will ALWAYS be something that games don't account for so if not tires then aero, if not aero then surface conditions, list goes on and on between car and track. Besides damage is half assed and doesn't work right in majority of modes in gt5. I still don't get why PD made differences across the game. Should be an option throughout, either on or off or add an extra level for minimal even.
I ran similar tests using a vw r32 in pure stock form on laguna seca, no aids on in both games and in both cases my times in both were close to each other (within less than a sec) but both compared to real life times were off by a few seconds. Im in a big vw enthusiast site and a guy who tracks his r32 for the last 2-3 years stated that gt5 has the r32 so piss poorly wrong that it drives nothing like the real thing. He didn't nod forzas version though, just that gts was drastically wrong. And that's the thing. The worlds best physics enginge will be only so good and a car's values input to that code must be right for the car to handle as it does in real life.
Can we get back to the topic at hand and not another fm vs gt thread?? Some of us are multiplatform owners and enjoy both franchises. I am looking forward to fm4 even ifall we have now is a leaked fm4 trailer, which this thread is supposed to be all about..