LogFAQs > #972970703

Fast is a range that can include slightly fast, pretty fast, just plain fast, really fast, insanely fast and all other variations of fast.

I would say on average though, that fast includes more speeds that are higher than pretty fast, and even within those you would generally go from pretty fast to fast then really fast etc.

So in most cases, I would conclude that fast is considered faster than pretty fast but slower than faster itself.