uh, citation needed? You'd at least have to specify whether you mean "offered for sale" or "purchased by users", because I suspect a big chunk of game sales volume comes from AAA games which are probably going to be native ports.

Not a complete list, but this is a tricked out wine used by many many games: http://transgaming.com/cider/games

Agreed, working in game development, I've very rarely heard of people using the Codeweaver's approach for commercial Mac ports.

I think this is just a case of playing a game of mishearing/misremembering.

A lot of EA's stuff is ported to Mac with Cider/TransGaming. From memory The Sims 3 is done that way.