The iRacing WOO dirt racing feature was implemented last week and being a fuel burning junkie I hopped in right away.
First off, one's question may be do these things live up to the real McCoy? I don't know. I can't say because to me, these things are oddities of life that I've never even come close to driving. Yes I can drift a car, but it's like these machines are simply built for that one sole purpose, so it's extra-alien to me. The closest I can compare these to, oddly, are snowmobiles... a vehicle I almost severely injured myself trying to learn to use.
Secondly, one may ask me if it's fun. It sure is. For one it's fun, and while I have no realism reference, by no stretch of the imagination did the controls feel "wrong". Fact that these controls are at least very intuitive to anyone who has ever slid ties on a slippery surface before makes this driving some of the most fun and unique ever.
Some may want me to refer to DIRT Rally for comparison, and while in some ways I could bring up the Lancia 037 Evo 2 to compare how you control the powerslide, iRacing's depiction of DIRT is far, far, far less forgiving, has no difficulty adjustment and the cement walls makes skimming the track edges a really, really bad idea.
The track conditions surprise me. Even solo, when trying to do pretend qualifying, after about 80 laps at Eldora, I'd find myself with this huge, dangerous cushion of loose dirt up high on the track. At some point, I had literally painted myself in a corner by solely taking the one fastest line I had found for 40 laps straight. Couldn't go up high in the turns anymore... you could see a build-up of 2-3 inches thick, about 8 feet wide of loose, unstable dirt along the turn's outer edges.
Here's a feature of my first race attempts (Eldora Speedway, 410 Sprint Cars, Sling mud for fun series), which yielded a couple of misfires, followed by a nice P2 finish.
This damn thing is highly addicting. I can't tell you how close it gets, but I can say it's definitely not "wrong", and once you wrap your head around the sliding/drifting mechanics and the MO of dirt driving overall, you're bound to have a terrifying blast in this.