I reckon it's harder to play slow than to play fast - the mistakes stand out. Which would make it logical to keep it slow for beginners I suppose.

Anyway that's what a slow jam is then. American, I take it from your comment about peanut butter - over this side of the ocean we tend to prefer it with Marmite or cheese, or on its own.

But it always makes me chuckle when you finish off a set by doubling up the speed, and the listeners get impressed, and you know that it was only the speed that allowed you to get away with some of the mistakes.