Yes, I would definately say its there, I have experienced it on several occassions.
Posting this again, surley this proves it isn't in the game:
"Okay, so I did a Monza career race earlier, expert diff, all assists off, all sims on, legend AI. Got pole in the Virgin but that's another topic, anyways early in the race I got nice and close behind Fernando out of the 2nd Lesmo and decided I'd take a screenie as I went under the old circuit. Check the speed and the perfect slipstreaming location:
http://img831.imageshack.us/img831/2650/slipstream1.jpg
Next lap I dropped back a bit, then made sure I got a good run again through the 2nd Lesmo as I did the lap before. Tried to take a screenie at the same point, here's the result:
http://img580.imageshack.us/img580/7371/slipstream2.jpg
2nd screenie is fractionally later so hence the extra 1km/h.
Next batch at Spa qually, should be getting the mother of all tows here (and the Macca should be getting a tow from the car in front, should be a double tow!):
http://img835.imageshack.us/img835/8990/slipstream3.jpg
Then next lap, actually a bit earlier on the straight with no slipstream I'm actually going quicker:
http://img411.imageshack.us/img411/9639/slipstream4.jpg
I can't notice any slipstream effect, as far as I can tell the speed you do on the straight is entirely dependant on your run out of the previous corner and ofcourse your setup. A car being in front or not doesn't make any difference as far as I've noticed."
You still think it's in the game?

