If the leeward screamer had that much speed on, they should have been clear and gone pretty quickly... that said, the boats above him are obligated to come up, no if's and's or but's. If that means they won't make that starting mark, that is regretable but unavoidable.

The leeward screamer, however, MUST give room and opportunity for the nearly stationary boats above him to avoid and give him the right of way he has just claimed by coming in fast from behind and below them. There is also a limit to which he can bring them up.

In any case, you don't indicate there was contact. IMO, the leeward boat should take his fast, clear start, chuckle into his drink, and continue on his way. The two slow boats on the line are not entitled to room of any sort. If the windward-most boat (or both of them for that matter) couldn't make the starting mark after giving the leeward boat his rights, then they're suffering from choosing a bad parking spot. Thou shalt not be a barge-a$$. Tack away, gybe around and start late.