It probably depends on the person and how much they sweat; I'd imagine I sweat more than the average person and I'd be nervous about staining this.
Were yours?
Thankfully I am past all that now, apart form the chronic hairdo, the spotty face, poor personal hygiene, awful social skills....... etc. etc....
It will depend on how much you type, of course, and it will be different for different people but I wish they'd have chosen another material even though this one looks gorgeous.