I think you need to define "puffs" and "gusts". We have the 42i Performance. It is the same hull as the DS, just taller mast and deeper keel. We take the first reef at about 18 knots true and leave the 128 jib alone. Boat feels good with this combination up to 25 knots. Over that we go to #2 reef and start rolling in the jib. We had one beer can race that started in almost no wind and during the last two legs a "Santana" (we sail in So.Calif.) filled in at about 25 knots. We left everything up and were hitting mid nines on the knotmeter. Only one round up on a sudden lift. We passed a Melges 32 and a Beneteau 36S7 that were constantly rounding up and out of control. Both of these boats were fully crewed and we were doublehanded.
Dana Point, CA