I don't know exactly. I just know what I see round here where the average trail is riddled with technical drops and steeps. No one rides rock shox except boxxxxxxers (dang x's). When asked they will say these are crap forks. But since people tend to take extremes I would say it really depends on what you want. They are cheap and disposable. At 250$ I would buy them just cause of the price. But I would break em.
"This coil-sprung, Hydracoil-damped Psylo XC is ideal for every type of riding, no matter how extreme - even dual slalom racing"
What a load of donkey crap. They aren't anywhere near THAT good. These guys are just salemen not looking out for the riders best interest. They are a xc fork. From easy to intermediate xc with some technical. If you are a lighweight rider they will be fine. But if you wanna get any bigger or go bigger get something better.