So, I didn't know what they were so looked them up. According to some of the reviewers on Amazon, the purpose of Whiskey stones is not to chill your drink, but

So, I didn't know what they were so looked them up. According to some of the reviewers on Amazon, the purpose of Whiskey stones is not to chill your drink, but rather to only very slightly chill whiskey below room temperature. That is, as one of the reviewers says, they are great for their very specific purpose and useless for everything else and they are not an ice replacement. So, they're not bunk - they just weren't designed for your use case. Of course, as another reviewer suggests, a cheaper way to chill your whiskey by a degree or two would be to put the glass in a fridge for a minute ;-) (Then again, someone else comments saying that "You don't want to chill your glass, because the moisture will effect your whiskey. You're still exposing your whiskey to the moisture (water) as the glass warms.")