As someone who regularly used to take part in track driving, and a regular gamer I think the two are worlds apart.
I for one have never quite been able to find the right combination of words to describe how I feel when Sim racing on the incar view. The tracks there, the corners come the same and so on. But its like you are floating along and not in contact with anything. For example, you dont feel the car start to spin in a game, you notice it from tyre noise or the bonnet not pointing where you thought it would be.
If I used a steering wheel it may improve, I have one but dont use it. The sensations still aren't there and personally when I drive I use the feeback form the road, the sensations I get to read the limit and judge it. I went to the lenghts of taking power steering of my road car because its FWD and you feel the track better without. I hardly do trackdays anymore but havent put it back on!
This guys done really really well. 3 seconds isnt much if you consider the claim he doesnt have a licence. To have the balls to come through some of those bends like that, when the extra sensations he will be getting are so new to him is really impressive. Many would have paniced or bottled it I am sure.
What sims have you tried?
If you haven't tried a simulation with a steering wheel, you have never experienced how far we've come. Since GP2 we have come a long way, with realistic Force feedback steering wheels, brake pedals with load cells and software that is getting closer and closer to the real experience.
To give you an example, the iRacing simulation uses laserscanning to create their tracks. That means that any bump, undulation or crack in the asphalt is realisctily modelled in the virtual track. Tire models are also getting closer and closer to the real deal. I can recommend you to try either netKar Pro, Live for Speed or iRacing with a good steering wheel (G25 i.e.).
I'm very curious what you will think about simulations after that.
Mclarens simulator is now so close to the real car that they can basically test new parts on their IN the simulation. That is quite astonishing.
On the subject of Huttu versus Hamilton in an F1 simulator, I would put my 100,- euro's on Huttu. He is unbeatable in the virtual world.