Yes, Mike. Welcome. Don't take my first reply very serioulsy....

Measurements based handicap systems (namely, Texel and SCHRS) rate the 1-up F16 configuration as slightly faster.

I assume the 2006 USSA Portsmouth numbers reflect this as being opposite because there is not much data to support the F16U rating. Most US based open handicap racing on F16s is done on the standard F16 rating, not the F16U rating. The results probably get submitted to USSA as if they are all using the F16 boat code, thus F16U is probably not evolving as it should.

The US F16 Class Association would like to see the F16U rating be dropped or at least included as one of the "general F16" boat codes that share the exact same handicap values (Blade, Taipan F16, G-Cat F16, etc.). F16 Class rules state that 1-up races head-to-head with 2-up.