HOLY SHIT WE JUST HIT A LAMP OMFG!!
I'm playing the PC version right now. A buddy shared his Uplay account with me. The performance is pretty shitty on my rig (i5 3570K, AMD 7970 OC, 8GB RAM) on Ultra. Toned it down to High and it's running a bit better now, but still not at 60 all the time.
I played a couple of missions, did some side stuff and caused some random mayhem. My verdict so far: IT'S AWESOME! It may not topple GTAV as the king of open-world games, but it's still a lot of fun. I've noticed some cool stuff like a certain kid in an early mission playing Child of Light on a tablet or garbage on the ground actually being blown around by wind.
I've been playing with a DS4 btw, the controls feel pretty smooth, driving is not awkward at all. I actually like it a lot more than the driving in Sleeping Dogs. Gunplay feels pretty satisfying as well. My doubts are gone and I will definitely go preorder the PS4 version again tomorrow.