Absolutely.
A-Rod is arguably the best player in the game, who desperately needs a change of scenery. Getting out of New York which badly effects his HR numbers, and into Fenway Park would greatly boost his stats. (hink 50 HR's) Also, he'd move back to shortstop where he is much more comfortable, and among the best in the game.
Add in the mental aspects which constantly plauge A-Rod everyday. Getting out of that can only help Rodriguez. He's got to be tired of getting booed everytime he looks at a strike, or being reminded on the street that he's not Jeter. In Boston, the pressure is much lower. He won't be expected to hit 500 HR's every single AB.
Also, you got to expect the Yankees would eat a portion of the salary. The Red Sox would get rid of $20 million per year, while adding $16 million in return. It's also easier to add a outfielder, then a shortstop. They way to look at it is Carlos Lee and Alex Rodriguez, or Manny and Lugo or Gonzalez. The production is clearly superior toward the former.
It's controversial issue, but Rodriguez is clearly the better player out of the two.
OK, ready to be blasted 1,2,3.....