Yes - 'tis true. It makes the most sense on a boat with a self-tacking jib, but I can see it being used in other cases as the jib is often set and forget on upwind beats.
Here's a video you can check
http://player.vimeo.com/video/60216954 from the Catacup last spring (one of my bucket list regattas) At about 1:29 you can see a handoff. In nearly (but not all) the upwind sailing shots, you can see the crew with the main sheet. The skipper takes the main sheet downwind as the crew has their hands full with the spinnaker.
I was able to do it yesterday on a Tiger with a fairly new crew in 12-13kts of wind. Worked pretty well.
Basic process is this: Get a good upwind angle with some pressure in the main and cleat off the main. Crew should be going out on the wire as you're doing this. Pass the crew the sheet between the skipper trap and the side stay. Crew cranks down on the main while the skipper goes out on the wire. Crew adjusts main to taste (A wise man told me to sheet half as much twice as often - ie many quick small adjustments are better than slow big ones). In our setup, you cannot cleat the main while out on the trap. This is on purpose!
When its time to tack, I let the crew know and then slide in and take the main sheet. Crew comes in while I initiate the turn, sheet out on the main, and clear the tiller extension to the other side. As I complete the turn, I sheet in a medium amount on the new heading as the crew is going out on the wire. Then its time to hand off again and repeat above.
Its easier than it sounds, provided you're crew has some instinct for managing the main. It does take some time for the skipper and crew to get in sync with each other. I was definitely able to sail faster (less pinching) with this setup.
One last comment: being a crew on these boats in a breeze is really hard work and requires a lot of strength and stamina. For the Nacra17 Olympic boat, they made it mixed (ie male/female) on the boat. In nearly all cases the guy is the crew. (for this reason and better boat balance as well).
Edited by rehmbo on Sep 16, 2013 - 06:44 AM.
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Jeff R
'88 H18 "Jolly Mon"
'10 C2 USA1193
NE IN / SE MI
cramsailing.com--