Anyone thinking of buying a Gazelle should read the little book 'Cruising Designs', by Thomas Colvin. I'll just quote this from the chapter 'Toward a design philosophy':
'Superb windward ability in cruising vessels is not a requirement. What is required is good performance in close reaching, broad reaching, and running, as it is rare, especially in ocean cruising, that one sails closer than 5 1/2 or 6 points to the wind. With this in mind, low rigs and generous sail area are axiomatic. '
There are also chapters on the Gazelle and comments on the chinese rig.
Tom Colvin was undoubtedly a fine seaman, designer and boat builder, but he was dancing to a different tune from that of almost all other sailors. In the decades after WW2, he was the main driving force in the North American school of thought regarding 'westernised' chinese boats and chinese rigs. He drew on notes, sketches and photos that he'd taken whilst in China, but said that available information was meagre. Basically he tried to copy some traditional chinese types of boat and rig. At the same time in Europe, the main driving force was Blondie Hasler, who took the basic concept of the chinese rig and totally re-imagined it for use on yachts, resulting in Jester in 1960. To a large extent, those schools of thought have now merged. We recognise, I think, that Blondie oversimplified the sailplan, that Tom stuck too rigidly to traditional sailplans, and most of all, that a flat sail, though easier to understand than a cambered sail, is never going to be very good at windward work. We need and expect better than 6 points to the wind (67.5˚) in a coastal cruising yacht, and expect it even in an ocean cruising yacht.