Dave Allen's 'Imp', top points scorer in the 1977 American Admiral's Cup team influenced IOR racing design on two fronts. She proved that an emphasis on off-the-wind speed did not compromise winning potential in England's famous Solent racing waters and also that a more scientific approach to lightweight structures had a positive effect on boat speed. Ron Holland, together with Lars Bergstrom and Kiwi Boats in Florida created a significant precedent with the building of 'Imp'.

Taking the concepts that were proven with 'Imp', the Maxi yacht 'Condor', close reaching under her distinctive yellow spinnaker, used similar construction methods and has successfully traversed the major oceans of the world.