Of course those boats would be discounted, but that doesn't mean they would slow the average sailor down one bit.
I would really like to get my hands on one of those boats.
In one sentence you say "duh, they are heavy of course they should be discounted". You say a heavy boat won't slow down an average sailor I disagree, a heavy boat will slow them down exactly the same amount as it would an expert sailor.
I think your definition of an average sailor differs from mine a great deal. Do you think all the current heavy boat owners will disclose that their boat is heavy when they go to sell it? If not, why not?