The issue here has nothing to do with "less" and "more", and everything to do with units of measure. When samtregar says his routine is 400% faster, he is obviously implying a unit of measure based on rate, ie. number of executions per second. Dominus's quip assumed an inverse unit of measure based on seconds per execution. Personally, I think samtregar's assumption about units was the better one. Most people are accustomed to thinking about things in terms of rate, ie. if I say I made my script run 4x faster, there's really no confusion. If I say I made it run 75% faster, things get muddled. But once it goes over 100%, there's no question as to what is meant.

   MeowChow                                   
               s aamecha.s a..a\u$&owag.print