Ok... ok... lol. First off, the new McLaren San Francisco dealership is actually down in Palo Alto near Stanfurd Junior College. Showroom isn't huge, but very nice - right next door is the coming Fisker dealership. And they have a McLaren F1 parked in the middle of the showroom belonging to the owner of the dealership, Tom Price. Tom, if you're reading this, sorry about the drool marks.
My single greatest impression was that while the car feels big and planted, it's amazing how nimble it is, and yet never felt like it was on the edge of throwing me into the barriers. Now, some "journalists" might want to feel like they're a hair's breath away death every time they're behind the wheel, I prefer to reserve that feeling for the race track. I loved how the rear end didn't want to wiggle out around every bend. Obviously, as it was my first time in the car, and first time driving the particular route we took, I couldn't push it hard into the corners, but every corner did bring more and more confidence to pitch it in.
As for the sound... the car was the older model, so it didn't feature the upgraded bypass valve that allows more noise into the cabin, and it had the standard exhaust. The noise was aural bliss, to me. It wasn't yelling and barking in my ear at low RPMs like a Lambo, and when it needed to roar, it made a beautiful sound. Yes, the 458 is louder, and I can see why people like it better, but the 12C will be sharing daily driver duty with my Porsche, so having something that doesn't ALWAYS yell in my ear is rather requisite.
Speaking of the roar, when you put the hammer down in track mode, holy crap. I didn't think there was a mass produced street car out there that could pull quite like a 911 TurboS. And while the Porsche is supposedly faster 0-60, the 12C certainly felt faster - more akin to a roller coaster than a road car.
Visibility was eerily excellent. My only niggle with the car, besides some vibrations and rattles that the McLaren engineer attributed to the fact that the car was a prototype and had been abused amidst all the test drives - that means ALL you guys who got to drive the car in the past few weeks across the States - was the brakes. The car had the iron brakes, and I neglected to ask more about these specific brakes. I found them difficult to modulate, and the pedal quite stiff. There seemed to be little stopping power in the first half of pedal travel, but when you reached the lock, the car just stopped. Nice, but wish the balance was a bit better.
Lastly, it was pretty cool driving through areas of Palo Alto that are clearly familiar with McLaren, but hadn't yet seen one. At one point, we were driving in traffic, and people were rolling down their windows taking pictures. That's always fun!