I think the point is to compare like for like, the Lexus will be quicker against a small car with a little engine but that's a bit like saying you can drive faster than I can run so you're quicker
Comparing similar size or target models (lower end 3 series, higher end Mondeo etc)then they could be fairly considered in the slower end of the scale. The point is having one and feeling good about it, if you want speed then it'd need to be S/C or Turbo, IS300 or a 'tezza.