Yes, you can (at least mostly...*). The lack of skid was
before switching it off - once off, massive sliding/squealing was had, making for much more fun! In normal driving situations, I can do without this form of fun
.
*I've seen it represented (I think it was in the PCA magazine) that even though you can turn PSM off, it continues to monitor and can come back on if something really crazy is happening with the car. The example they mentioned was coming unloaded over the top of a rise while cornering at track speeds - the PSM was rumored to come on briefly and then go back off. I doubt I'll ever come to see that myself...