I've sailed my boat single handed several times. Once I did so in a small fleet of 4 or 5 other double handed F18s in three races in varying conditions. Even without the jib, I had a tremendous advantage upwind in less than 10 knots and was full-out trapezing at about 8. When the breeze built to over 10, my advantage began to dissolve. When it got over 12, I was loosing ground to the fleet rather quickly. Beyond that I was getting pretty tired and frustrated trying to keep the boat moving forward with any speed or height.

Without some sort of major change to sail plan for a single handed option, I don't think it's reasonable to expect any kind of single handed vs. double handed rule changes to allow straight up competition.

The F18 rule set has never made any consideration for one-up sailing since it's inception (go to www.f18-international.org for more historical information). The class is so widely popular and still gaining momentum that I think such a change wouldn't be very likely.