Cars more equal?

Ok so ive been spending a bit of time lately putting in times on B class leaderboards (mostly to see where my tunes are at compared to others) and ive been noticing that apart from one or two exceptions the cars at the top are many and varied. So does this mean that the cars are more balanced or are folk just getting better at tuning and/or bored with the ‘usual’ not sure about other classes as ive not looked. Although i know P and X are just broken. What do you guys think?